MCQs For NCERT Class 11 Biology Chapter 13 Photosynthesis in Higher Plants

Please refer to the MCQ Questions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants with Answers. The following Photosynthesis in Higher Plants Class 11 Biology MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 11. Our experts have designed MCQ Questions for Class 11 Biology with Answers for all chapters in your NCERT Class 11 Biology book.

Photosynthesis in Higher Plants Class 11 MCQ Questions with Answers

See below Photosynthesis in Higher Plants Class 11 Biology MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Dark reactions of photosynthesis occur in
(a) granal thylakoid membranes
(b) stromal lamella membranes
(c) stroma outside photosynthetic lamellae
(d) periplastidial space. 

Question. A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of itrogen utilisation. In which of the following physiological groups would you assign this plant?
(a) CAM
(b) Nitrogen fixer
(c) C₃
(d) C₄

Question. Bundle sheath cells
(a) are rich in PEP carboxylase
(b) lack RuBisCO
(c) lack both RuBisCO and PEP carboxylase
(d) are rich in RuBisCO. 

Question. CAM helps the plants in
(a) conserving water
(b) secondary growth
(c) disease resistance
(d) reproduction. 

Question. Carbon dioxide joins the photosynthetic pathway in
(a) PS I
(b) PS II
(c) light reaction
(d) dark reaction.

Question. Phosphoenol pyruvate (PEP) is the primary CO₂ acceptor in
(a) C₄ plants
(b) C₂ plants
(c) C₃ and C₄ plants
(d) C₃ plants.

Question. The C₄ plants are photosynthetically more efficient than C₃ plants because
(a) the CO₂ efflux is not prevented
(b) they have more chloroplasts
(c) the CO₂ compensation point is more
(d) CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase.

Question. In leaves of C₄ plants, malic acid synthesis during CO₂ fixation occurs in
(a) bundle sheath
(b) guard cells
(c) epidermal cells
(d) mesophyll cells.

Question. In the leaves of C₄ plants, malic acid formation during CO₂ fixation occurs in the cells of
(a) bundle sheath
(b) phloem
(c) epidermis
(d) mesophyll

Question. As compared to a C₃-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C₄-plants?
(a) Two
(b) Six
(c) Twelve
(d) Zero 

Question. In kranz anatomy, the bundle sheath cells have
(a) thin walls, many intercellular spaces and no chloroplasts
(b) thick walls, no intercellular spaces and large number of chloroplasts
(c) thin walls, no intercellular spaces and several chloroplasts
(d) thick walls, many intercellular spaces and few chloroplasts.

Question. Kranz anatomy is one of the characteristics of the leaves of
(a) potato
(b) wheat
(c) sugarcane
(d) mustard. 

Question. Stomata of CAM plants
(a) are always open
(b) open during the day and close at night
(c) open during the night and close during the day
(d) never open. 

Question. Which pair is wrong?
(a) C₃-maize
(b) C₄-kranz anatomy
(c) Calvin cycle-PGA
(d) Hatch and Slack cycle – OAA

Question. Photosynthesis in C₄ plants is relatively less limited by atmospheric CO₂ levels because
(a) effective pumping of CO₂ into bundle sheath cells
(b) RuBisCO in C₄ plants has higher affinity for CO₂
(c) four carbon acids are the primary initial CO₂ fixation products
(d) the primary fixation of CO₂ is mediated via PEP carboxylase.

Question. In C₄ plants, CO₂ combines with
(a) phosphoenol pyruvate
(b) phosphoglyceraldehyde
(c) phosphoglyceric acid
(d) ribulose diphosphate. 

Question. In C₄ plants, CO₂ fixation is done by
(a) sclerenchyma
(b) chlorenchyma and hypodermis
(c) mesophyll cells
(d) guard cells. 

Question. The CO₂ fixation during C₄ pathway occurs in the chloroplast of
(a) guard cells
(b) bundle sheath cells
(c) mesophyll cells
(d) spongy parenchyma. 

Question. In sugarcane plant ¹⁴CO₂ is fixed to malic acid, in which the enzyme that fixes CO₂ is
(a) ribulose biphosphate carboxylase
(b) phosphoenol pyruvic acid carboxylase
(c) ribulose phosphate kinase
(d) fructose phosphatase. 

Question. Which is the first CO₂ acceptor enzyme in C₄ plants?
(a) RuDP carboxylase
(b) Phosphoric acid
(c) RuBisCO
(d) PEP- carboxylase

Question. The first carbon dioxide acceptor in C₄-plants is
(a) phosphoenol-pyruvate
(b) ribulose 1, 5-diphosphate
(c) oxaloacetic acid
(d) phosphoglyceric acid. 

Question. Kranz anatomy is typical of
(a) C₄ plants
(b) C₃ plants
(c) C₂ plants
(d) CAM plants. 

Question. In C₄ plants, Calvin cycle operates in
(a) stroma of bundle sheath chloroplasts
(b) grana of bundle sheath chloroplasts
(c) grana of mesophyll chloroplasts
(d) stroma of mesophyll chloro

Question. Which one is a C₄-plant?
(a) Papaya
(b) Pea
(c) Potato
(d) Maize/corn 

Question. The enzyme that catalyses carbon dioxide fixation in C₄ plants is
(a) RuBP carboxylase
(b) PEP carboxylase
(c) carbonic anhydrase
(d) carboxydismutase.

Question. The oxygenation activity of RuBisCO enzyme in
photorespiration leads to the formation of
(a) 2 molecules of 3-C compound
(b) 1 molecule of 3-C compound
(c) 1 molecule of 6-C compound
(d) 1 molecule of 4-C compound and 1 molecule of 2-C compound 

Question. The process which makes major difference between C₃ and C₄ plants is
(a) glycolysis
(b) Calvin cycle
(c) photorespiration
(d) respiration.

Question. C₄ plants are more efficient in photosynthesis than C₃ plants due to
(a) higher leaf area
(b) presence of larger number of chloroplasts in the leaf cells
(c) presence of thin cuticle
(d) lower rate of photorespiration.

Question. During photorespiration, the oxygen consuming reaction(s) occur in
(a) stroma of chloroplasts
(b) stroma of chloroplasts and mitochondria
(c) stroma of chloroplasts and peroxisomes
(d) grana of chloroplasts and peroxisomes. 

Question. Which one of the following is wrong in relation to photorespiration?
(a) It occurs in chloroplast.
(b) It occurs in day time only.
(c) It is a characteristic of C₄ plants.
(d) It is a characteristic of C₃ plants.

Question. Photorespiration is favoured by
(a) high temperature and low O2
(b) high humidity and temperature
(c) high O2 and low CO₂
(d) high CO2 and low O₂. 

Question. A process that makes important difference between C3 and C4 plants is
(a) transpiration
(b) glycolysis
(c) photosynthesis
(d) photorespiration.

Question. The correct sequence of cell organelles during photorespiration is
(a) chloroplast, Golgi-bodies, mitochondria
(b) chloroplast, rough endoplasmic reticulum, dictyosomes
(c) chloroplast, mitochondria, peroxisome
(d) chloroplast, vacuole, peroxisome. 

Question. Plants adapted to low light intensity have
(a) larger photosynthetic unit size than the sun plants
(b) higher rate of CO₂ fixation than the sun plants
(c) more extended root system
(d) leaves modified to spines. 

Question. The rate of photosynthesis is higher in
(a) very high light
(b) continuous light
(c) red light
(d) green light.

Question. ‘The law of limiting factors’ was proposed by
(a) Leibig
(b) Hatch and Slack
(c) Blackman
(d) Arnon. 

Question. At a temperature above 35ºC
(a) rate of photosynthesis will decline earlier than that of respiration
(b) rate of respiration will decline earlier than that of photosynthesis
(c) there is no fixed pattern
(d) both decline simultaneously. 

Question. During monsoon, the rice crop of eastern states of India shows lesser yield due to limiting factor of
(a) CO₂
(b) light
(c) temperature
(d) water.

Question. The substrate for photorespiration is
(a) phosphoglyceric acid
(b) glycolate
(c) serine
(d) glycine.

Question. With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
(a) Increasing atmospheric CO₂ concentration up to 0.05% can enhance CO₂ fixation rate.
(b) C₃ plants respond to higher temperature with enhanced photosynthesis while C₄ plants have much lower temperature optimum.
(c) Tomato is a greenhouse crop which can be grown in CO₂-enriched atmosphere for higher yield.
(d) Light saturation for CO₂ fixation occurs at 10% of full sunlight.

Question. Half leaf experiment proves that
(a) light is essential for photosynthesis.
(b) CO₂ is essential for photosynthesis.
(c) O₂ releases during photosynthesis.
(d) chlorophyll is essential for photosynthesis.

Question. One of the earliest experiments on photosynthesis was done in 1770 by Joseph Priestley. He demonstrated that
(a) sun is the ultimate source of energy.
(b) water is essential for life.
(c) plants & animals “restore” the air for each other.
(d) chlorophyll captures light energy.

Question. Contribution of Ingen-Housz in elucidation of process of photosynthesis is that
(a) only green parts of plants exposed to light can convert foul air (CO₂) into pure air (O₂).
(b) green plants convert light energy into chemical energy
(c) plants have the capacity to purify foul air.
(d) sunlight is the ultimate source of energy for plants and animals.

Question. Photosynthesis is a/an
(a) physio-chemical process.
(b) physical process.
(c) chemical process.
(d) energy wasting process.

Question. Photosynthesis is important because
(a) it is the primary source of food on earth.
(b) it is responsible for release of O₂ into the atmosphere by green plants.
(c) it is responsible for release of water vapour into the atmosphere.
(d) both (a) and (b)

Question. The experiment material used by Van Neil, to prove that O₂ comes out from water was studied on
(a) Chlorella pyrenoidosa
(b) Cladophora
(c) purple & green sulphur bacteria
(d) blue green algae

Question. The light harvesting complex (LHC) is made up of
(a) one molecule of Chl a.
(b) very few molecules of Chl a.
(c) hundreds of pigment molecules bound to proteins.
(d) Chl a + Chl c + protein + DNA.

Question. In a plant cell, which of the following pigments participates directly in the light reactions of photosynthesis?
(a) Chlorophyll a
(b) Chlorophyll b
(c) Chlorophyll d
(d) Carotenoids

Question. In PS-I, the reaction centre Chl a has absorption maxima at _____________, while in PS-II the reaction centre Chl a has absorption maxima at ___________.
(a) P₆₈₀, P₇₀₀
(b) P₇₀₀, P₆₈₀
(c) P₈₀₀, P₆₀₀
(d) P₇₀₀, P₉₀₀

Question. How can we separate leaf pigments of any green plant?
(a) Column chromatography
(b) Paper chromatography
(c) Electrophoresis
(d) Radio-isotopes