Please refer to the MCQ Questions for Class 11 Biology Chapter 8 Cell The Unit of Life with Answers. The following The Cell The Unit of Life 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.
Cell The Unit of Life Class 11 MCQ Questions with Answers
See below Cell The Unit of Life Class 11 Biology MCQ Questions, solve the questions and compare your answers with the solutions provided below.
Question. Middle lamella is:
(a) Plasma membrane covering the two cells together.
(b) Made up of calcium pectate and magnesium pectate
(c) A pore in the plasma membrane of cell.
(d) A cell wall between two adjacent animal cells.
Question. Following are some events of mitotic cell division, select the correct order in which these events occur.
i. Condensation of chromosomes is completed.
ii. Chromosomes lose their identity as discrete elements.
iii. Sister chromatids separate
iv. Initiation of the assembly of the mitotic spindle.
(a) i ii iii iv
(b) iv i iii ii
(c) ii i iv iii
(d) iv iii i ii
Question. Select the correct option for the following:
(A) The cell cycle is divided into two basic phases —–(i) ——- and ——(ii).
(B) During—–(iii)—— cell is metabolically active and continuously grows.
(C) Centriole duplicates in the cytoplasm during ——–(iv)——.
(a) (i) Interphase (ii) M-phase
(iii) G1phase (iv) S phase
(b) (i) G1phase (ii) S-phase
(iii) Interphase (iv) S phase
(c) (i) Interphase (ii) M-phase
(iii) G2phase (iv) G1 phase
(d) (i) Karyokinesis
(iv) S phase
Question. In animal and plant cell the division of cytoplasm is respectively:
(a) Centripetal and Centripetal
(b) Centrifugal and Centripetal
(c) Centripetal and Centrifugal
(d) Centrifugal and Centrifugal
Question. Which of the following structures is component of the centriole?
(a) Endoplasmic reticulum
(d) Golgi body
Question. Golgi apparatus is derived from:
(d) Nuclear membrane
Question. Which cellular component is absent in the leaves of onion?
(b) Cell wall
(d) Endoplasmic reticulum
Question. Read the following statements and find out the incorrect statement:
(a) In an animal cell cytokinesis is achieved by the appearance of a furrow in the plasma membrane.
(b) In an animal cell furrow formation starts in the center of cell and grows outward to meet the existing lateral walls.
(c) Cell plate represents the middle lamella between the walls of two adjacent plant cells.
(d) During cytokinesis, organelles like mitochondria and plastid get distributed between the two daughter cells.
Question. The special arrangement of lipids in the cell membrane ensures that the-
(a) Polar tail of saturated hydrocarbons is protected from the aqueous environment.
(b) Non-polar head of unsaturated hydrocarbons is protected from the aqueous environment.
(c) Polar tail of unsaturated hydrocarbons is protected from the aqueous environment.
(d) Non-polar tail of saturated hydrocarbons is protected from the aqueous environment.
Question. Identify the mitotic stage from the given feature.
i. Nuclear envelope degenerates completely.
ii. Chromosomes are spread throughout the cytoplasm.
iii. Fully formed spindle apparatus consists of fine fibres.
(a) Early prophase
(d) Transition to metaphase
Question. Which of the following is not true regarding ER?
I. ER is also called the control center of the cell.
II. It modifies chemicals that are toxic to the cell.
III. SER is a major site for the synthesis of proteins.
IV. ER is a network of interconnected cisternae, tubules, and vesicles present in the cytoplasm.
(a) Only I
(b) I and III
(c) All except III
(d) Only III
Question. Algal cell consists of
(c) Minerals like calcium carbonate
Question. A cell without cell wall would also lack
Question. Middle lamellae
(a) Mainly consists of Ca- pectate
(b) Holds different neighbouring cells together
(c) Is formed as cell plate during cytokinesis
Question. The innermost portion of a mature plant cell wall is the
(a) Primary cell wall
(b) Plasma membrane
(c) Secondary cell wall
Question. Choose the correct statement
(a) The secondary cell wall forms when growth of cell stops
(b) The secondary wall is inextensible
(c) Plasmodesmata consists of a fine pore/ canal in the cell wall and middle lamellae. It is cytoplasmic bridge among neighbouring cells
Question. Which of the following are not membrane bound?
Question. The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are
(a) stroma lamellae
Question. Select the correct matching in the following pairs.
(a) Rough ER – Synthesis of glycogen
(b) Rough ER – Oxidation of fatty acids
(c) Smooth ER – Oxidation of phospholipids
(d) Smooth ER – Synthesis of lipid
Question. The chromosomes in which centromere is situated close to one end are
Question. DNA is not present in
Question. Nuclear envelope is a derivative of
(b) rough endoplasmic reticulum
(c) smooth endoplasmic reticulum
(d) membrane of Golgi complex.
Question. Match the following and select the correct answer. (A) Centriole (i) lnfoldings in mitochondria (B) Chlorophyll (ii) Thylakoids (C) Cristae (iii) Nucleic acids (D) Ribozymes (iv) Basal ody of cilia or flagella
A B C D
(a) (iv) (ii) (i) (iii)
(b) (i) (ii) (iv) (iii)
(c) (i) (iii) (ii) (iv)
(d) (iv) (iii) (i) (ii)
Question. The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as
(c) intermediate filaments
Question. The osmotic expansion of a cell kept in water is chiefly regulated by
Question. Which of the following types of plastid does not contain stored food material?
Question. Select the correct statement from the following regarding cell membrane.
(a) Na+ and K+ ions move across cell membrane by passive transport.
(b) Proteins make up 60 to 70% of the cell membrane.
(c) Lipids are arranged in a bilayer with polar heads towards the inner part.
(d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.
Question. What is true about ribosomes?
(a) The prokaryotic ribosomes are 80S, where “S” stands for sedimentation coefficient.
(b) These are composed of ribonucleic acid and proteins.
(c) These are found only in eukaryotic cells.
(d) These are self-splicing introns of some
Question. Which one of the following does not differ in E.coli and Chlamydomonas?
(b) Chromosomal organization
(c) Cell wall
(d) Cell membrane
Question. The Golgi complex plays a major role
(a) as energy transferring organelles
(b) in post translational modification of proteins and glycosylation of lipids
(c) in trapping the light and transforming it into chemical energy
(d) in digesting proteins and carbohydrates.
Question. A major site for synthesis of lipids is
Question. Peptide synthesis inside a cell takes place in
Question. Important site for formation of glycoproteins and glycolipids is
(b) Golgi apparatus
Question. Which one of the following is not considered as a part of the endomembrane system?
(a) Golgi complex
Question. Which one of the following cellular parts is correctly described?
(a) Thylakoids – flattened membranous sacs forming the grana of chloroplasts
(b) Centrioles – sites for active RNA synthesis
(c) Ribosomes – those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S)
(d) Lysosomes – optimally active at a pH of about 8.5
Question. Which one of the following structures is an organelle within an organelle?
Question. The plasma membrane consists mainly of
(a) phospholipids embedded in a protein bilayer
(b) proteins embedded in a phospholipid bilayer
(c) proteins embedded in a polymer of glucose molecules
(d) proteins embedded in a carbohydrate bilayer.
Question. Which one of the following structures between two adjacent cells is an effective transport pathway?
(c) Endoplasmic reticulum
Question. An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called
(b) endoplasmic reticulum
Question. Middle lamella is composed mainly of
(a) muramic acid
(b) calcium pectate
Question. Cytoskeleton is made up of
(a) callose deposits
(b) cellulosic microfibrils
(c) proteinaceous filaments
(d) calcium carbonate granules.
Question. The main area of various types of activities of a cell is
(a) plasma membrane
Question. Which one of the following has its own DNA?
Question. Plasmodesmata are
(a) locomotory structures
(b) membranes connecting the nucleus with plasmalemma
(c) connections between adjacent cells
(d) lignified cemented layers between cells.
Question. In germinating seeds, fatty acids are degraded exclusively in the
Question. Which one of the following is not a constituent of cell membrane?
Question. Select the wrong statement from the following
(a) Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane.
(b) Both chloroplasts and mitochondria contain DNA.
(c) The chloroplasts are generally much larger than mitochondria.
(d) Both chloroplasts and mitochondria contain an inner and an outer membrane.
Question. Which of the following statements regarding mitochondrial membrane is not correct ?
(a) The outer membrane resembles a sieve.
(b) The outer membrane is permeable to all kinds of molecules.
(c) The enzymes of the electron transfer chain are embedded in the outer membrane.
(d) The inner membrane is highly convoluted forming a series of infoldings.
Question. Which of the following statements regarding cilia is not correct ?
(a) Cilia contain an outer ring of nine doublet microtubules surrounding two singlet microtubules.
(b) The organised beating of cilia is controlled by fluxes of Ca2+ across the membrane.
(c) Cilia are hair-like cellular appendages.
(d) Microtubules of cilia are composed of tubulin.
Question. Vacuole in a plant cell
(a) lacks membrane and contains air
(b) lacks membrane and contains water and excretory substances
(c) is membrane-bound and contains storage proteins and lipids
(d) is membrane-bound and contains water and excretory substances.
Question. Keeping in view the ‘fluid mosaic model’ for the structure of cell membrane, which one of the following statement is correct with respect to the movements of lipids and proteins rom one lipid monolayer to the other (described as flip-flop movement
(a) While proteins can flip-flop, lipids can not
(b) Neither lipids, nor proteins can flip-flop
(c) Both lipids and proteins can flip-flop
(d) While lipids can rarely flip-flop, proteins cannot.
Question. Chlorophyll in chloroplasts is located in
(d) both grana and stroma.
Question. The main organelle involved in modification and outing of newly synthesized proteins to their destinations is
(d) endoplasmic reticulum.
Question. Ribosomes are produced in
(d) Golgi body.
Question. The telomeres of eukaryotic chromosomes consist of short sequences of
(a) thymine rich repeats
(b) cytosine rich repeats
(c) adenine rich repeats
(d) guanine rich repeats.
Question. In chloroplasts, chlorophyll is present in the
(a) outer membrane
(b) inner membrane