MCQs for NCERT Class 10 Science Chapter 6 Life Processes

Please refer to the MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers. The following Life Processes Class 10 Science MCQ Questions have been designed based on the current academic year syllabus and examination guidelines for Class 10. Our faculty has designed MCQ Questions for Class 10 Science with Answers for all chapters as per your NCERT Class 10 Science book.

Life Processes Class 10 MCQ Questions with Answers

Please see below Life Processes Class 10 Science MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question: Vocal cords occur in:
(a) pharynx
(b) glottis
(c) bronchial tube
(d) larynx

Question: Which cell organelle is involved in breakdown of glucose to produce energy for metabolic activities?
(a) Mitochondria
(b) Chloroplast
(c) Endoplasmic reticulum
(d) Golgi body

Question: How many pairs of salivary glands are found in humans?
(a) Two
(b) Three
(c) Six
(d) Four

Question: Which of the following structures is involved in gaseous exchange in woody stem of a plant?
(a) Stomata
(b) Lenticel
(c) Guard cell
(d) Epidermis

Question: The diagram shows the arrangement of cells inside the leaf of a green plant. (No cell contents are shown). Which cells normally contain chloroplasts?

(a) 1 and 2
(b) 1 and 4
(c) 2 and 3
(d) 2 and 4

Question: From which structure, the free oxygen gas produced during photosynthesis is released?
(a) Epidermis
(b) Stomata
(c) Cortex
(d) Guard cell

Question: In the cardiac cycle, diastole is:
(a) The number of heart beats per minut
(b) The relaxation period after contraction of the heart
(c) The forceful pumping action of the heart
(d) The contraction period after relaxation of the heart.

Question: What is the mode of nutrition in fungi?
(a) Autotrophic
(b) Heterotrophic
(c) Saprophytic
(d) Parasitic

Question: Blood vessel carry blood from lungs to heart through:
(a) Pulmonary artery
(b) Pulmonary vein
(c) Coronory artery
(d) None of these

Question: Which substances are produced by anaerobic respiration in yeast?

Key ✔{ = produced, #= not produced.

Question: A plant is kept in the dark for two days. A leaf is used in an experiment to investigate the effect of two factors on photosynthesis as shown in the diagram.

What are the colours of Q and R, when the leaf is tested for starch, using iodine solution?

Question: The diagram represents a section through the small intestine.

What is the role of the structure labelled X ?
(a) They help to move the food along
(b) They make a large surface area for absorption
(c) They protect against bacteria
(d) They move mucus over the surface

Question: Villi present on the internal wall of intestine help in the
(a) emulsification of fats
(b) breakdown of proteins
(c) absorption of digested food
(d) digestion of carbohydrates

Question: Only two of the following Statements accurately describe what happens in the mouth.
1. Amylase breaks down large starch molecules into smaller maltose molecules.
2. Chewing increases the surface area of food for digestion.
3. Saliva emulsifies fats into smaller droplets.
4. Teeth breakup large insoluble molecules into smaller soluble molecules. which statements are correct?
(a) 1 and 2
(b) 2 and 3
(c) 3 and 4
(d) 1 and 4

Question: Choose the forms in which most plants absorb nitrogen:
1. Proteins
2. Nitrates and nitrites
3. Urea
4. Atmospheric nitrogen
Choose the correct option.
(a) 1 and 2 (b) 2 and 3
(c) 3 and 4 (d) 1 and 4

Question: When a person eats some egg white, proteins and awater enter the stomach. Which substances are found
leaving the stomach and leaving the small intestine?

Question: In photosynthesis, which substances are used up, which are produced and which are necessary, but remain unchanged after the reaction?

Question: During vigorous physical exercise, lactic acid is formed from glucose inside the muscle cells because
(a) there is lack of oxygen
(b) there is lack of water
(c) there is excess of carbon dioxide
(d) none of the above

Question: The following changes take place in an athlete’s body during a 100 m race. Which change occurs first?
(a) Increased availability of oxygen to muscles
(b) Increased breathing rate
(c) Increased carbon dioxide concentration in the blood
(d) Increased production of carbon dioxide by muscles

Question: What is the final product of photosynthesis?
(a) Protein
(b) Fat
(c) Starch
(d) Mineral salt

Question: The diagram shows part of the human gas exchange system.

What are W,X,Y and Z ?

Question: Major function of contractile vacuole is:
(a) Excretion
(b) Circulation
(c) Osmoregulation
(d) All the above

Question: In which order do these events occur in human nutrition?
(a) Digestion ” ingestion ” absorption ” assimilation
(b) Digestion ” ingestion ” assimilation ” absorption
(c) Ingestion ” digestion ” absorption ” assimilation
(d) Ingestion ” digestion ” assimilation ” absorption

Question: Instrument used to measure blood pressure is
(a) barometer
(b) potometer
(c) thermometer
(d) sphygmomanometer

Question: The diagram shows the human gut. Which numbered structures secrete digestive enzymes?

(a) 1, 2, 3 and 4
(b) 1, 2, 3 and 6
(c) 2, 3, 4 and 5
(d) 2, 3, 5 and 6

Question: The diagram shows the ribs and some of the muscles used in breathing.

which muscles relax in moving from position X to position Y ?

Question: Which of the following is not a disorder of the circulatory system?
(a) Atherosclerosis
(b) Arteriosclerosis
(c) Arthritis
(d) Angina

Question: Which of the following is responsible for the transport of water and minerals from roots to aerial parts of the plant?
(a) Xylem
(b) Phloem
(c) Cortex
(d) Both (a) and (b)

Question: Excretion is carried out by nephridia in:
(a) cockroach
(b) amoeba
(c) earthworm
(d) human

Question: The diagram represents a part of human circulatory system. Where is the blood pressure highest?

Question: What is the correct route for blood flow in a human?
(a) Left atrium ” Left ventricle ” Lungs ” Right ventricle ” Right atrium
(b) Left atrium ” Left ventricle ” Right ventricle ” Right atrium ” Lungs
(c) Right atrium ” Right ventricle ” Left ventricle ” Left atrium ” Lungs
(d) Right atrium ” Right ventricle ” Lungs ” Left atrium ” Left ventricle

Question: The diagram shows a vertical section through the heart.

what are the functions of the numbered blood vessels?

Question: Urea is formed in:
(a) Liver
(b) Spleen
(c) Kidney
(d) Lungs

Question: What may happen if a young plant is dug up and replanted in another place?
(a) The leaves lose less water
(b) The roots cannot take up mineral salts
(c) The stem cannot transport water
(d) The surface area of the root is reduced

Question: The table shows the characteristics of blood in one blood vessel of the body.

which blood vessel contains blood with these characteristics?
(a) Aorta
(b) Pulmonary artery
(c) Pulmonary vein
(d) Vena cava

Question: Amoeba shows following kind of nutrition –
(a) autotrophic
(b) holozoic
(c) saprotrophic
(d) parasitic

Question: Name the part of alimentary canal receiving bile from the liver.
a) Oesophagus
b) Stomach
c) Small intestine
d) Large intestine

Question: Which one of the following blood vessels contains only deoxygenated blood?
a) pulmonary vein
b) pulmonary artery
c) capillaries
d) Aorta

Question: Which of these is not a part of the small intestine?
a) Duodenum
b) Jejunum
c) Ileum
d) Rectum

Question: The kidneys in human beings are parts of the system for
(a) nutrition
(b) respiration
(c) excretion
(d) transpiration

Question: Trachea do not collapse when there is not much air because they are –
a) thick and muscular
b) having cartilaginous rings
c) Have valves
d) supported by larynx

Question: The autotrophic mode of nutrition requires –
a) Chlorophyll
b) Sunlight
c) Carbon – dioxide & water
d) all of the above

Question: In which of the following group/ groups of animals, heart does not pump oxygenated blood to different parts of the body?
a) Pisces only
b) Amphibians only
c) Amphibians and reptiles only
d) Pisces and amphibians.

Question: Woody plants carry gaseous exchange through
a) root hair
b) stem hair
c) Lenticels
d) epidermal cells.

Question: The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus

Question: The process by which blood is cleared of metabolic wastes in case of kidney failure is called
a) artificial kidney
b) dialysis
c) transplantation
d) filtration

Question: When air is blown from mouth into a test – tube containing lime water, the lime water turned milky due to presence of –
a) oxygen
b) nitrogen
c) water vapours
d) carbon – dioxide

Question: The autotrophic mode of nutrition requires
(a) carbon dioxide and water
(b) chlorophyll
(c) sunlight
(d) all of the above

Question: During contraction of heart, what prevents back􀁈ow of blood?
a) Thin walls of atria
b) Thick muscular walls of ventricles
c) Valves in heart
d) All of the above

Question: The filtration units of kidneys are called –
a) Ureter
b) Urethra
c) Neurons
d) nephrons.

Question: Amoeba captures food with the help of –
a) teeth
b) cilia
c) pseudopodia
d) tentacles

Question: Which of the following statements about the autographs is incorrect?
a) They store carbohydrates in the form of starch.
b) They constitute the first trophy level in food chains.
c) They convert CO₂ and water into carbohydrates in the absence of sunlight
d) They synthesize carbohydrates from CO₂ and water in the presence of sunlight & chlorophyll.

Question: The xylem in plants are responsible for
(a) transport of water
(b) transport of food
(c) transport of amino acids
(d) transport of oxygen

Question: The sites of exchange of wastes, nutrients, gases and hormones between the blood and body cells are the:
(a) arteries
(b) arterioles
(c) capillaries
(d) veins

Question: Which of the following is not a purpose of transpiration?
(a) Supplies water for photosynthesis
(b) Helps in translocation of sugar in plants
(c) Cools leaf surface
(d) Transports minerals from the soil to all the parts of the plant

Question: What are the functions of the Xylem?

Key ✔ = a function of xylem, #= not a function of xylem

Question: Which chambers of human heart contain oxygenated blood?
(a) Left atrium and left ventricle
(b) Left atrium and right ventricle
(c) Right atrium and left ventricle
(d) Right atrium and right ventricle

Question: Which process occurring in human body does not involve energy from respiration?
(a) Contraction of heart muscle
(b) Diffusion of oxygen from the alveoli into the blood
(c) Digestion of bread
(d) Maintaining a constant body temperature

Question: The process of conversion of glucose into pyruvic acid occurs in
(a) mitochondria
(b) cytoplasm
(c) outside the cell
(d) chloroplast

Question: The rate at which oxygen moves from the alveoli of our lungs into our blood:
(a) depends on the difference in oxygen concentration between the alveoli and the blood.
(b) depends on the color of the alveoli.
(c) depends on the availability of energy to transport gases across the membrane.
(d) none of the above

Question: Structural and functional unit of kidney is
(a) renal pelvis
(b) nephridia
(c) nephron
(d) hilum

Question. In which part of alimentary canal food is finally digested ?
(a) Stomach
(b) Mouth cavity
(c) Large intestine
(d) Small intestine

Question. The kidneys in human beings are a part of the system for :
(a) Nutrition
(b) Respiration
(c) Excretion
(d) Transportation

Question. During deficiency of oxygen in tissues of human beings pyruvic acid is converted into lactic acid in :
(a) Cytoplasm
(b) Chloroplast
(c) Mitochondria
(d) Golgi body

Question. The pancreas pour the secretions into the :
(a) Small intestine
(b) Large intestine
(c) Stomach
(d) Duodenum

Question. Which part of alimentary canal receives bile from the liver ?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Oesophagus

Question. The opening and closing of stomatal pores depends upon :
(a) Oxygen
(b) Water in guard cells
(c) Concentration of carbon dioxide in stomata
(d) Temperature

Question. The correct path of urine flow in our body is :
(a) Kidney → Ureter → Urethra → Urinary bladder
(b) Kidney → Urinary bladder → Urethra → Ureter
(c) Kidney → Ureter → Urinary bladder → Urethra
(d) Urinary bladder → Kidney → Ureter → Urethra

Question. In which of the following vertebrate groups heart does not pump oxygenated blood to different parts of the body ?
(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only

Question. Excess glucose is stored in the form of glycogen in the :
(a) Villi
(b) Liver
(c) Blood
(d) Lymph

Question: The function of the glomerulus and Bowman’s capsule of the nephron is to:
(a) reabsorb water into the blood
(b) eliminate ammonia from the body
(c) reabsorb salts and amino acids
(d) filter the blood and capture the filtrate

Question: Choose the incorrect pair.
(a) Ultrafiltration-Glomerulus
(b) Concentration of urine-Collecting duct
(c) Transport of urine-Ureter
(d) Storage of urine-Urinary bladder

Question: The correct order of air reaching from atmosphere to the lungs is through:
(a) external nares, larynx, trachea and air sac
(b) laryx, trachea, air sac and external nares
(c) trachea, air sac, external nares and larynx
(d) air sac, trachea, larynx and external nares

Question: The diagram shows parts of a flowering plant. Where does the most transpiration take place?

Question: In the figure given along side, the structures associated with human kidneys are marked (X,Y and Z ). The relative concentrations of urea in these structures is

(a) X is sometimes higher than Y
(b) Y is always higher than Z
(c) Y is always lower than Z
(d) Z is sometimes lower than X

Question: Proteins A

Identify the enzyme A involved in the above reaction.
(a) Salivary amylase
(b) Bile juice
(c) Pepsin
(d) Lipase

Question: The diagram given below represents the liver, kidney and some associated blood vessels. Identify the vessel from the labelled parts A-D in which the blood will contain the lowest concentration of urea.

(a) A
(b) B
(c) C
(d) D

Question: Veins can be differentiated from arteries because the veins:
(a) have valves
(b) have hard walls
(c) have pure blood in them
(d) have thick walls

Question: Digestion of food in human starts from:
(a) Duodenum
(b) Small intestine
(c) Mouth
(d) Large intestine

Question: An experiment is set up as shown. Flasks 1 and 2 contain lime water. Air is pumped through the flasks.

What is the appearance of lime water in flasks 1 and 2 after a period of ten minutes?

Question: Flame cells are the excretory structures in
(a) arthropods
(b) platyhelminths
(c) anneelids
(d) crustaceans

Question: Which one indicates hypertension or high Blood Pressure (BP)?
(a) 120/80
(b) 110/70
(c) 130/80
(d) 140/90

Question: Dialysing unit (artificial kidney) contains a fluid which is almost same as plasma except that is has
(a) high glucose
(b) high urea
(c) no urea
(d) high uric acid

Question: Which of the following is not a component of plasma?
(a) water
(b) globulins
(c) fibrinogen
(d) platelets

Question: Most often during a kidney disorder, the colour of urine changes from yellow to others. A patient is secreting dark colured urine which turns to blue or black later. This is due to the presence of which of the following?
(a) Homogentisic acid
(b) Methaemoglobin
(c) Coproporphyrin
(d) Both (a) and (b)

Question: The movement of water and dissolved minerals from the roots of the leaves is best explained by:
(a) Cohesion-tension theory
(b) Translocation
(c) Tensile strength
(d) Pressure-flow hypothesis

Question: Figure given below is representing the dialysis machine for removing nitrogenous wastes in patient with a kidney failure.

which substances out of the following in the dialysis fluid should be at a lower concentration than in the blood of patient?
(a) Glucose and urea
(b) Glucose and amino acids
(c) Salts and urea
(d) Glucose and salts

Question: Main excretory organ of humans is
(a) kidney
(b) lungs
(c) skin
(d) liver

Question: In amoeba the digestion is intracellular because:
(a) Amoeba is unicellular
(b) Amoeba is multicellular
(c) Amoeba is found in a pond
(d) Amoeba is a microscopic animal

Question: Which of the following is used in manufacturing of varnishes, glazing agents, etc?
(a) Tannin
(b) Resins
(c) Essential oil
(d) Rubber

Question: Digestion of starch starts from:
(a) Stomach
(b) Intestine
(c) Oesophagus
(d) Mouth

Question: Observe the figure given below which represents the control of water concentration in the blood.

This is negative feedback system because
(a) It decreases the amount of water in the blood
(b) It increases any change occurring in the amount of water in the blood
(c) It reverses any change occurring in the amount of water in the blood
(d) It increases the amount of water in the blood

Question:What is the term used when vessels open and let more blood through?
(a) Vasoconstriction
(b) Vasodilatation
(c) Increased permeability
(d) None of these

Question: The process of transpiration in plants helps in:
(a) Opening of stomata
(b) Absorption of CO₂ from atmosphere
(c) Upward conduction of water and minerals
(d) Absorption of O₂ from atmosphere

Question: The diagram given along side shows the human excretory system. Identify the function of part labelled as X .

(a) To excrete urea
(b) To produce urea
(c) To produce urine
(d) To store urine

Question: Example(s) of liquid waste product in plants is/are
(a) rubber
(b) clove oil
(c) gum
(d) All of these

Question: The breakdown of pyruvate to give carbon-di-oxide, water and energy takes place in:
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus

Question: A healthy woman consumes a litre of water at once.
1. How will be the internal environment of her body affected by this?
2. A corrective measure to bring the arising condition to normal state is.
Select the correct option for (i) and (ii) from those given below:

Question: Root cap has no role in water absorption because:
(a) It has no direct connection with the vascular system
(b) It has no cells containing chloroplasts
(c) It has no root hairs
(d) It has loosely arranged cells.

Question. The blood leaving the tissues becomes richer in:     
(a) Carbon dioxide
(b) Water
(c) Haemoglobin
(d) Oxygen

Question. The internal (cellular) energy reserve in autotrophs is:   
(a) Glycogen
(b) Protein
(c) Starch
(d) Fatty acid

Question. Choose the function of the pancreatic Juice from the following:           
(a) Trypsin digests proteins and lipase carbohydrates
(b) Trypsin digests emulsified fats and lipase proteins
(c) Trypsin and lipase digest fats
(d) Trypsin digests proteins and lipase digests emulsified fats droplets

Question. Anaerobic process:           
(a) takes place in yeast during fermentation.
(b) takes place in the presence of oxygen.
(c) produces only energy in the muscles of human beings.
(d) produces ethanol, oxygen and energy.

Question. When air is blown from mouth into a test tube containing lime water, the lime water turns milky due to the presence of:         
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Water vapour

Question. Choose the event that does not occur in photosynthesis.   
(a) Absorption of light energy by chlorophyll
(b) Reduction of carbon dioxide to carbohydrates
(c) Oxidation of carbon to carbon dioxide
(d) Conversion of light energy to chemical energy

Question. The opening and closing of the stomatal pore depends upon:       
(a) oxygen
(b) temperature
(c) water in guard cells
(d) concentration of CO₂ in stomata

Question. Choose the forms in which most plants absorb nitrogen:           
(i) Proteins
(ii) Nitrates and Nitrites
(iii) Urea
(iv) Atmospheric nitrogen
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Question. Which is the first enzyme to mix with food in the digestive tract?
(a) Pepsin
(b) Cellulose
(c) Amylase
(d) Trypsin

Question. If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?           
(a) Proteins breaking down into amino acids
(b) Starch breaking down into sugars
(c) fats breaking down into fatty acids and glycerol
(d) Absorption of vitamins

Question. In the excretory system of human beings, some substances in the initial filtrate such as glucose, amino acids, salts and water are selectively reabsorbed in:           
(a) Urethra
(b) Nephron
(c) Ureter
(d) Urinary bladder

Question: The process of transpiration in plants helps in:
(a) Opening of stomata
(b) Absorption of CO₂ from atmosphere
(c) Upward conduction of water and minerals
(d) Absorption of O₂ from atmosphere

Question: Which substances will be present in the glomerular filtrate from the kidneys of a mammal?

Key✔ = present, #= absent

Fill in The Blank

Question: In human, the right lung is ………………. lobed.

Question: Principal waste product of metabolism in humans is………………

Question: ………………. valve separates the left atrium from the left ventricle.

Question: Second heart sound heard as ………………. is due to closure of ………………. valves at the beginning of ventricular diastole.

Question: Energy rich compound generated during photosynthesis is ………………. .

Question: Carbonic anchydrase regulates the formation of ……………….

Question: Ninety percent of the water lost by the plants during transpiration is through the ………………. of the leaf.

Question: Pressure in the arteries during ventricular relaxation is called ………………. pressure.

Question: Blood circulation in humans is called ……………… circulation.

Question: ………………. are regarded as complete photosynthetic units of plants.

Question: ……………… are the lymphatic capillaries arising from the small intestine.

Question: ……………… are the lymphatic capillaries arising from the small intestine.

Question: Starch changes blue in ………………. solution.

Question: ………………. are fat soluble vitamins.

Question: The structural and functional units of lungs is ………………. .

Question: Two ………………. are present on both sides of the stomata.

Question: ………………. (of bile juice) help in emulsification of fats.

Question: Largest digestive gland in the human body is ………………. .

Question: Synthesis of ATP using light energy in photosynthesis is ………………. .

Question: The ………………. prevents the entry of food into the respiratory tract.

Question: Diffusion is insufficient to meet ………………. requirement of multicellular organisms like humans.

Question: In ……………… , waste is removed by diffusion.

Question: ………………. node is present near the opening of superior and inferior vena cavae.

Question: Man is ………………. in nutrition.

Question: ………………. involves the intake of complex material prepared by other organisms.

Question: A plant pigment known as ………………. is involved in the phenomenon of photoperiodism.

Question: Contraction of heart is known as ……………….

Question: The functional unit of the mammalian kidney is the ………………. .

Question: The major function of the ………………. blood cells is to transport oxygen.

Question: ………………. are the solid bodies in fruits in which waste is stored.

Question: The semiliquid mixture of partially digested food found in the stomach is called ………………. .

Question: ………………. veins pour their ………………. blood into left atrium.

Question: Glomerulus occurs in ………………. capsule.

Question: ………………. secretes bile and cholesterol.

Question: ..…………….. movements occur along the gut.

Question: The thin double-walled sac enclosing the heart is called ……………….

Question: Kidney eliminate the excretory waste materials as their aqueous solution, called …………….. .

Question: Rings of ………………. present in trachea, bronchi and bronchioles prevent their collapse when air is not passing through them.

Question: Bowman’s capsule and tubule taken together make a ………………………….

Question: The organs which extract the nitrogenous wastes from the blood are ………………………….

Question: The process in plants which converts light energy into chemical energy ………………………….

True/False

Question: Fermentation is a form of aerobic respiration.

Question: Teeth are the only part of the digestive system that physically breaks down food.

Question: The loss of water by a plant is called transpiration.

Question: Blood is not a tissue because it is a fluid.

Question: Arteries are the widest blood vessels.

Question: The lacteals contain absorbed carbohydrates.

Question: Grass-eating animals need a longer small intestine to allow the cellulose to be digested.

Question: Translocation is the transportation of the products of photosynthesis.

Question: Fishes respire through skin.

Question: Veins are thick walled.

Question: Only animals have tissues.

Question: Essential amino acids cannot be synthesized in human body.

Question: Bowman’s capsule is found in heart.

26. The exchange of nutrients and waste products between the blood and cells occurs within the arteries.

Question: Living organisms must maintain a constant internal environment.

8. Birds and mammals have tow-chambered heart.

Question: Respiration is the only source of energy for all organisms.

Question: In a general sense, digestion is simply hydrolysis of complex polymers to monomers.

Question: Circulatory system also performs the function of homeostasis.

Question: Only the multicellular organisms require transporting mechanisms.

Question: Leucocytes play an important role in blood coagulation.

Question: External respiration may be called breathing.

Question: Some organs are used in more than one system.

Question: Stomata are tiny pores present on the surface of leaves.

Question: In humans, protein digestion is completed in the mouth.

Question: The systems in an organism work independently.

Question: Trypsin digests proteins into amino acids.

Question: Stretching of inner wall of guard cells, open the stomata.

Question: Carbon-di-oxide cannot be transported with haemoglobin.

Question: Humans have an open circulatory system.

Question: Deficiency of folic acid causes scurvy.

Question: Generally gravitational water is utilized by the plants.

Question: In humans, the alveoli are the functioning units of external respiration.

Question: A complete digestive tract consists of an oral and an anal opening.

Question: In photosynthesis, carbon-di-oxide is given out by diffusion process.

Question: The liquid portion of the blood is called plasma.

Matching Questions

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Question: Name the pigment present in plants, which can absorb solar energy.

Question: Which part of visible spectrum is absorbed by chlorophyll pigments?

Question: Name the hormone which is responsible for reabsorption of water in nephrons.

Question: Name the plant tissue through which water and minerals are transported in plants.

Question: What is glycolysis?

Question: Give one example each of saprophytic and parasitic nutrition.

Question: Name the red pigment carrying oxygen in blood.

Question: Name excretory organ in amoeba and earthworm

Question: Which of the four chambers of the human heart has the thickest muscular walls?

Question: What is the mode of nutrition in fungi and plasmodium?

Question: Where does digestion of starch begin in human body?

Question: Name the largest artery of body.

Question: Food moves down the gut by peristalsis. Which region of brain controls peristalsis.

Question: Which of them contain less nitrogenous waste – renal vein or the renal artery?

Assertion and Reasoning Based Questions 

Directions : In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as :
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) If assertion is true, but reason is false.
(d) If assertion is false but reason is true.

Question. Assertion : Left atrium possesses the thickest muscles.
Reason : Left atrium receives oxygenated blood from the lungs.
Answer : (d) Left ventricle has thickest muscles because it pumps the blood to the whole body. Thus assertion is false but reason is true.

Question. Assertion : Doctors can tell by counting the pulse rate and listening to heart beats whether a person is well or not.
Reason : Pulse rate and heart beats change according to the condition of our heart.
Answer : (a) Pulse rate is the number of heart beats per minute. So, by counting the pulse rate we can understand the heart beat and in turn understand the working condition of the heart. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : The effect of root pressure in transport of water is more important at night.
Reason : During day, stomata is open, transpiration takes place which help in transport of water.
Answer : (a) During the day transpiration becomes the main driving force for pulling up of water. But at night since there is no sunlight transpiration do not take place, so water is pulled up due to root pressure. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : The rate of photosynthesis will be lowered if the leaves are coated with oil.
Reason : Stomata get’s blocked and thus gaseous exchange is affected.
Answer : (a) Stomata is a tiny pore in leaves that help in gaseous exchange, so if the stomata gets blocked due to oil, gaseous exchange will be affected and hence rate of photosynthesis gets lowered. Thus both assertion and reason are true and reason is the correct explanation of the assertion.

Question. Assertion : Urinary bladder and ureters are lined by transitional epithelium.
Reason : Ureters carry the urine to urinary bladder where it is stored temporarily.
Answer : (b) Ureters function is to carry urine from kidney to the bladder, it does not depend on what lining it has. 
Thus both assertion and reason are true, but reason is not the correct explanation of the assertion.

Creating Based Questions

Question. Create a correct pathway taken by urine in our body ?
Answer : Kidney → Ureter → Urinary bladder → Urethra.

Question. Using the following words develop the transport system in plants : Xylem, food, roots, leaves, stem, soil, phloem, water.
Answer : Plants have water and food transport system. Water transport system–root absorb water from the soil, xylem is a tissue that conducts water from the roots to the upper part of plant. It is unidirectional.
Food transport system — food prepared by the leaves is transported by phloem to other parts of the plant. It is bidirectional.

Question. Using the following information form a pathway showing the flow of blood through heart. And also include information that is not mentioned below to complete it. Left ventricle, inferior vena cava, superior vena cava, tricuspid valve, left auricle, bicuspid valve, right auricle, lungs, right ventricle and pulmonary vein.
Answer : Right side of the heart : Inferior + superior vena cava → brings deoxygenated blood from the body → enters right auricle → through tricuspid valve enters right ventricle → through → pulmonary artery enters lungs for purification of blood. Left side of heart : Oxygenated blood enters from lungs → left auricle via pulmonary vein → left ventricle via bicuspid valve → aorta → rest of the body. 
[Words marked in BOLD are new information which is not mentioned]

Question. If a person has a systolic pressure of 140 mm of Hg and the pulse pressure is 40 mm of Hg. Solve it with the help of this information and find out the diastolic pressure.
Answer : We know that pulse pressure is the difference between systolic and diastolic pressure. So, let us take diastole pressure as X.
Systole pressure – Diastole pressure = Pulse pressure
140 – X = 40
So, X = 140 – 40
= 100 mm of Hg.

Question. Ravi was diagnosed with kidney failure. He was advised to undergo dialysis for twice in a week. 
After undergoing dialysis for a month he was unable to continue the treatment as it is very painful. What alternative treatment solution can you suggest for Ravi other than dialysis.
Answer : A person diagnosed with kidney failure can undergo kidney transplantation other than dialysis. It is the transplant of a kidney into a patient with end-stage renal disease. A healthy donor can donate his or her kidney to the patient via surgery.

Paragraph/Table and Case Study Based Questions 

1. Read the following and answer any four questions from 1(i) to 1(v):
When we are injured and start bleeding, the loss of blood from the system has to be minimised. In addition, leakage would lead to a loss of pressure which would reduce the efficiency of the pumping system.

Question. Which of the following cells present in blood help in clotting of blood at the point of injury?
(a) R.B.C
(b) W.B.C
(c) Platelets
(d) Mucus cells

Question. The given graph represents the blood pressure of 18 years old man taken during sitting, standing and jumping position What is the correct representation of normal blood pressure of a human being?
(a) 180/20 mm of Hg
(b) 120/80 mm of Hg
(c) 80/120 mm of Hg
(d) 20/180 mm of Hg

Question. Why is it necessary to separate oxygenated and de-oxygenated blood in mammals and birds?
(a) Mixing of blood would lead to clotting.
(b) For efficient supply of oxygen and to maintain body temperature.
(c) Birds need more blood for flying.
(d) None of these

Question. Choose the correct option with respect to blood circulatory system in humans.
(a) A-Veins, B-Pulmonary artery, C-Pulmonary vein
(b) A-Vena cava, B-Pulmonary vein, C-Pulmonary artery
(c) A-Vena cava, B-Pulmonary artery, C-Pulmonary vein
(d) A-Veins, B-Pulmonary vein, C-Pulmonary artery

Question. Which of the chamber of heart muscles are thick?
(a) Ventricles
(b) Atrium
(c) Septum
(d) Right atrium only

2. Read the following and answer any four questions from 2(i) to 2(v):
Like humans, plants also need to maintain the vital functions even when they are not doing anything particular. These maintenance processes are needed to prevent damage and break-down, energy is needed for them. This energy comes from outside the body of the individual organism. So, there must be a process to transfer a source of energy from outside the body of the organism, the outside sources of energy could be quite varied, since the environment is not under the control of the individual organism. These sources of energy, therefore, need to be broken down or built up in the body, and must be finally converted to a uniform source of energy that can be used for the various molecular movements needed for maintaining living structures, as well as to the kind of molecules the body needs to grow.
The following graph shows the growth of plants A and B over the period of weeks.

Question. Roots of the plants absorb water from the soil through the process of:
(a) Diffusion
(b) Transpiration
(c) Osmosis
(d) None of these

Question. What is the energy currency of the cell?
(a) Adenosine triphosphorous
(b) Adenosine tetraphosphorous
(c) Adenosine triphosphate
(d) Adenosine diphosphate

Question. The following diagram show the cross-section of leaf.

Choose the correct option with respect to the function of labelled parts.
(a) A- helps in transportation of gases throughout the length of plants
(b) B-convert chemical energy into light energy via the photosynthetic process.
(c) C-allows gaseous exchange between the leaf and the outside atmosphere through the stomata
(d) D-guard cells from pathogen attacks

Question. Plants can get rid of excess water by ……………
(a) Transpiration
(b) Translocation
(c) Photosynthesis
(d) Diffusion

Question. Carbon dioxide is an important element for production of food by plants. With a help of the below experiment, it is demonstrated that photosynthesis cannot be possible without carbon dioxide.

What is the role of potassium hydroxide in the above demonstrated experiment?
(a) Hygroscopic
(b) Absorb carbon dioxide
(c) Absorb oxygen
(d) Absorb water

3. Read the following and answer any four questions from 3(i) to 3(v):
Mr. Prabhakar went on a hiking with his family. He is a patient of renal failure. In the middle of the trip,
he fell ill. He had leg cramps and experienced acidity with high blood pressure. He was immediately taken to nearby hospital. Doctor prescribed him antacids and gave him injection for high BP. He advised Mr. Prabhakar to rest a while and eat healthy.

(i) Choose the correct option.
(a) Cramps occurred due to formation of acetic acid in leg muscles.
(b) Cramps are formed in case of absence of oxygen.
(c) Cramps occurred due to formation of lactic acid in leg muscles.
(d) Cramps occurred due to lack of glucose in body.

(ii) Study the following diagram.

What does is represent?
(a) Hemodialysis
(b) Blood transfusion
(c) Bypass surgery
(d) Renaldialysis

(iii) What kind of injection were given to Mr. Prabhakar for high BP condition?
(a) Insulin
(b) Glucose
(c) Saline
(d) Calcium

(iv) In a healthy adult, the initial filtrate in the kidneys is about:
(a) 1-2L daily
(b) 80L daily
(c) 180L daily
(d) 120L daily

(v) WWhich of the following is not the function of hydrochloric acid in the body?
(a) Creating acidic medium in stomach
(b) Digestion of proteins
(c) Facilitate the function of pepsin, for digestion of proteins
(d) Killing of microbes present

4. Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life sustaining activities and discarding, as waste products, carbon dioxide, and water.

(a) Which is the product of cellular respiration ?
(b) The production of ATP is dependent on two components. What are these two components ?
(c) What amount of energy is released by ATP during an exothermic reaction ?
(d) What are the functions that are performed by ATP ?
Answer : (a) Adenosine triphosphateis the major and the key product of cellular respiration. It is generated at the
end of the respiration. ATP plays an important role in the vital processes of life. It acts as a connecting link between anabolism and catabolism.
(b) The ATP is produced from two components. These two components are adenosine diphosphate (ADP) and phosphate.
(c) The ATP releases the energy of during an exothermic reaction.
(d) The functions performed by ATP are as follows:
(i) It helps in the process of muscle contraction.
(ii) The ATP helps in the synthesis of proteins.
(iii) It is an important factor for the conduction of nerve impulses.

5. Study the table given below and answer the questions.

(a) The urine is produced by which organ system?
(b) What are nephrons ?
(c) Define the term urine.
(d) What is the final part of the urinary system ?
Answer : (a) The formation of urine takes place in the kidney, which is a part of the urinary system.
(b) Nephron is the first part of the urinary system present inside the kidneys. The wastes and water from blood plasma move to the nephron through hollow tubules. Nephron produces urine, and urine has all the wastes.
(c) The waste fluid produced during metabolic activities is known as urine. The wastes and toxins are removed out of the body through urine.
(d) Urethra is the final part of the urinary system is known as the urethra. The function of this part is to remove urine out of the body. It is a single tubular structure that is functional when urinary bladder expands and gets filled with urine.