NCERT Class 11 Chapter 8 Biology Cell the Unit of Life MCQ

NCERT Class 11 Chapter 8 Biology Cell the Unit of Life MCQ | Questions & Answers: Candidates who are interested in the Class 11 Chapter 8 Biology Cell the Unit of Life concept here is an opportunity for you guys to attempt the NCERT Class 11 Chapter 8 Biology Cell the Unit of Life MCQ Quiz. So, without any delay take up the quiz and know your final grade.

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1. The cell organelle involved in glycosylation of protein is

A. endoplasmic reticulum

B. mitochondria

C. peroxisome

D. ribosome

2. The outer layer of vacuole is called

A. tonoplast

B. leucoplast

C. cell wall

D. plasmalayer

3. Which of the following cell organelle remains enveloped by a single unit membrane?

A. Lysosomes

B. Chloroplast

C. Mitochondria

D. Nucleus

4. The nucleolus is the site of formation of

A. ribosomes

B. spindle fibres

C. chromosomes

D. peroxisomes

5. Which one of the following combination is mismatched?

A. Pili - Reproduction

B. Cell wall - Protective, determines shape, prevents from bursting

C. Flagella, Pili and Fimbriae - Surface structures of bacterial cell

D. Glycocalyx - may be capsule or slime layer

6. The fluidity of membranes in a plant in cold weather may be maintained by

A. increasing the number of phospholipids with unsaturated hydrocarbon tails

B. increasing the proportion of integral proteins

C. increasing concentration of cholesterol in membrane

D. increasing the number of phospholipids with saturated hydrocarbon tail

7. The cell as a basic unit of structure of living beings was discovered by

A. Schleiden and Schwann

B. Gregore Mendel

C. Robert Hooke

D. Aristotle

8. Which pair of structures are usually found in both plant and animal cells?

A. Cell membrane and nucleolus

B. Cell membrane and cell wall

C. Nucleolus and chloroplast

D. Nucleus and cell wall

9. Most abundant lipid in the cell membrane is

A. phospholipids

B. cerebrosides

C. glycolipids

D. None of these

10. Cell recognition and adhesion are facilitated by components of plasma membrane. These components are generally

A. glycolipids and glycoproteins

B. both lipids and proteins

C. protein molecules alone

D. None of these

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11. Smooth endoplasmic reticulum is well developed in the cells which synthesize

A. steroids

B. carbohydrates

C. proteins

D. all of these

12. Quasi-fluid nature of membrane is due to

A. Phospholipid

B. Peripheral protein

C. Integral protein

D. Sugar moiety

13. Gas vacuole is present in

A. All of the above

B. Green photosynthetic bacteria

C. Purple photosynthetic bacteria

D. Blue green algae

14. Which of the following feature is not associated with centrosome?

A. Lipid bilayer covering

B. Two centriole

C. Two cylindrical structures

D. Pericentriolar material

15. What is the site of DNA and centriole duplication respectively

A. Nucleus, cytoplasm

B. Nucleus, nucleus

C. Cytoplasm, nucleus

D. Nucleus, nucleolous

16. Cell wall

A. All are correct

B. Contains minerals like calcium carbonate in certain algae

C. Helps in cell to cell interaction

D. Helps in cell to cell interaction

17. Golgi bodies are involved in

A. All of the above

B. Modification of proteins

C. Synthesis of glycolipids

D. Recycling of broken plasma membrane during endocytosis

18. Aleuroplasts, amyloplasts and elaioplasts

A. Store protein, starch and fat respectively

B. Help in photolysis of water

C. Store reserve food and pigments

D. Divide by multiple fission

19. Reformation of nucleolus, golgi complex and ER occurs in

A. Anaphase

B. Metaphase

C. Both

D. None of these

20. Which group of organelles is involved in synthesis of substances needed by cell?

A. Ribosome, RER, SER

B. RER, lysosome, vacuole

C. Lysosome, vacuole, ribosome

D. None of these

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21. Organelles can be separated from cell homogenate through

A. Chromatography

B. X-rays diffraction

C. differential centrifugation

D. auto-radiography

22. Electron microscope has a high resolution power. This is due to

A. electromagnetic lenses

B. very low wavelength of electron beam

C. low wavelength of light source used

D. high numerical aperture of glass lenses used

23. Magnification of compound microscope is not connected with

A. numerical aperture

B. focal length of objective

C. focal length of eye piece

D. tube length

24. Resolution power is the ability to

A. distinguish two trees

B. distinguish two close objects

C. distinguish amongst organelles

D. magnify image

25. Angstrom (Å) is equal to

A. 0.01 μm

B. 0.001μm

C. 0.0001μm

D. 0.00001 μm