MCQs on Cell Biology

1. The term cell was given by

1. Robert Hooke
2. Tatum
3. Schwann
4. De Bary

2. The cell is not applied for

1. Algae
2. Bacteria
3. Virus
4. Fungi

3. The membrane around the vacuole is known as

1. Tonoplast
2. Elaioplast
3. Cytoplast
4. Amyloplast

4. Microfilaments are composed of a protein called

1. Tubulin
2. Actin
3. Myosin
4. Chitin

5. A plant cell wall is mainly composed of

1. Protein
2. Cellulose
3. Lipid
4. Starch

6. Glycolipids in the plasma membrane are located at

1. Inner leaflet of the plasma membrane
2. The outer leaflet of the plasma membrane
3. Evenly distributed in the inner and outer leaflets
4. It varies according to cell types

7. Lysosomes are known as “suicidal bags” because

1. Parasitic activity
2. Presence of food vacuole
3. Hydrolytic activity
4. Catalytic activity

8. The properties of integral membrane proteins can be studied by

1. Atomic force microscopy
2. Cryo-sectioning and electron microscopy
3. Freeze-fracture technique and electron microscopy
4. All of the above

9. The fluidity of the plasma membrane increases with

1. Increase in unsaturated fatty acids in the membrane
2. Increase in saturated fatty acids in the membrane
3. Increase in glycolipid content in the membrane
4. Increase in phospholipid content in the membrane

10. Which among the following defines GPI anchored proteins?

1. Integral proteins of the plasma membrane
2. Peripheral proteins of the plasma membrane
3. Proteins that bind to ion-gated channels in the plasma membrane
4. Proteins which randomly bind to lipids of the plasma membrane

11. The resting potential membrane is determined by

1. Potassium-ion gradient
2. Sodium-ion gradient
3. Bicarbonate-ion gradient
4. None

12. The oxygen and carbon dioxide crosses the plasma membrane by the process of

1. Active diffusion
2. Facilitated diffusion
3. Passive diffusion
4. Random diffusion

13. A cell without a cell wall is termed as

1. Tonoplast
2. Protoplast
3. Symplast
4. Apoplast

14. Which is not an example of transmembrane transport between different subcellular compartments?

1. Transport from the stroma into thylakoid space
2. Transport from the cytoplasm into the lumen of the endoplasmic reticulum
3. Transport from the endoplasmic reticulum into the Golgi complex
4. Transport from mitochondrial intermembrane space into the mitochondrial matrix

15. Which is correct regarding the peptides in the Ramachandran Plot?

1. The sequence of the peptide can be deduced
2. It is not possible to conclude whether a peptide adopts entirely helix or entirely beta-sheet conformation
3. Peptides that are unstructured will have all the backbone dihedral angles in the disallowed regions
4. The occurrence of a beta-turn conformation in a peptide can be deduced.

16. The function of the centrosome is

1. Formation of spindle fibres
2. Osmoregulation
3. Secretion
4. Protein synthesis

17. Which cell organelle is involved in apoptosis?

1. Lysosome
2. ER
3. Golgi
4. Mitochondria

18. Phosphatidylserine residues in the plasma membrane are located at

1. Inner leaflet of the plasma membrane
2. The outer leaflet of the plasma membrane
3. Evenly distributed in the inner and outer leaflet
4. None

19. Distribution of intrinsic proteins in the plasma membrane is

1. Random
2. Symmetrical
3. Asymmetrical
4. None

20. Select a foodborne toxin

1. Botulinum toxin
2. Tetanus Toxin
3. Diphtheria toxin
4. Cholera Toxin

Answer Key

1- 1	2- 3	3- 1	4- 2	5- 2
6- 2	7- 3	8- 3	9- 1	10- 2
11- 1	12- 3	13- 2	14- 3	15- 4
16- 1	17- 4	18- 1	19- 3	20- 1