MCQ Questions on Cell Biology
1. The term cell was given by
(a) Robert Hooke
(b) Tatum
(c) Schwann
(d) De Bary
Answer
Answer: (a) Robert Hooke
2. The cell is not applied for
(a) Algae
(b) Bacteria
(c) Virus
(d) Fungi
Answer
Answer: (c) Virus
3. The membrane around the vacuole is known as
(a) Tonoplast
(b) Elaioplast
(c) Cytoplast
(d) Amyloplast
Answer
Answer: (a) Tonoplast
4. Microfilaments are composed of a protein called
(a) Tubulin
(b) Actin
(c) Myosin
(d) Chitin
Answer
Answer: (b) Actin
5. A plant cell wall is mainly composed of
(a) Protein
(b) Cellulose
(c) Lipid
(d) Starch
Answer
Answer: (b) Cellulose
6. Glycolipids in the plasma membrane are located at
(a) Inner leaflet of the plasma membrane
(b) The outer leaflet of the plasma membrane
(c) Evenly distributed in the inner and outer leaflets
(d) It varies according to cell types
Answer
Answer: (b) The outer leaflet of the plasma membrane
7. Lysosomes are known as “suicidal bags” because
(a) Parasitic activity
(b) Presence of food vacuole
(c) Hydrolytic activity
(d) Catalytic activity
Answer
Answer: (c) Hydrolytic activity
8. The properties of integral membrane proteins can be studied by
(a) Atomic force microscopy
(b) Cryo-sectioning and electron microscopy
(c) Freeze-fracture technique and electron microscopy
(d) All of the above
Answer
Answer: (c) Freeze-fracture technique and electron microscopy
9. The fluidity of the plasma membrane increases with
(a) Increase in unsaturated fatty acids in the membrane
(b) Increase in saturated fatty acids in the membrane
(c) Increase in glycolipid content in the membrane
(d) Increase in phospholipid content in the membrane
Answer
Answer: (a) Increase in unsaturated fatty acids in the membrane
10. Which among the following defines GPI anchored proteins?
(a) Integral proteins of the plasma membrane
(b) Peripheral proteins of the plasma membrane
(c) Proteins that bind to ion-gated channels in the plasma membrane
(d) Proteins which randomly bind to lipids of the plasma membrane
Answer
Answer: (b) Peripheral proteins of the plasma membrane
11. The resting potential membrane is determined by
(a) Potassium-ion gradient
(b) Sodium-ion gradient
(c) Bicarbonate-ion gradient
(d) None
Answer
Answer: (a) Potassium-ion gradient
12. The oxygen and carbon dioxide crosses the plasma membrane by the process of
(a) Active diffusion
(b) Facilitated diffusion
(c) Passive diffusion
(d) Random diffusion
Answer
Answer: (c) Passive diffusion
13. A cell without a cell wall is termed as
(a) Tonoplast
(b) Protoplast
(c) Symplast
(d) Apoplast
Answer
Answer: (b) Protoplast
14. Which is not an example of transmembrane transport between different subcellular compartments?
(a) Transport from the stroma into thylakoid space
(b) Transport from the cytoplasm into the lumen of the endoplasmic reticulum
(c) Transport from the endoplasmic reticulum into the Golgi complex
(d) Transport from mitochondrial intermembrane space into the mitochondrial matrix
Answer
Answer: (c) Transport from the endoplasmic reticulum into the Golgi complex
15. Which is correct regarding the peptides in the Ramachandran Plot?
(a) The sequence of the peptide can be deduced
(b) It is not possible to conclude whether a peptide adopts entirely helix or entirely beta-sheet conformation
(c) Peptides that are unstructured will have all the backbone dihedral angles in the disallowed regions
(d) The occurrence of a beta-turn conformation in a peptide can be deduced.
Answer
Answer: (d) The occurrence of a beta-turn conformation in a peptide can be deduced.
16. The function of the centrosome is
(a) Formation of spindle fibres
(b) Osmoregulation
(c) Secretion
(d) Protein synthesis
Answer
Answer: (a) Formation of spindle fibres
17. Which cell organelle is involved in apoptosis?
(a) Lysosome
(b) ER
(c) Golgi
(d) Mitochondria
Answer
Answer: (d) Mitochondria
18. Phosphatidylserine residues in the plasma membrane are located at
(a) Inner leaflet of the plasma membrane
(b) The outer leaflet of the plasma membrane
(c) Evenly distributed in the inner and outer leaflet
(d) None
Answer
Answer: (a) Inner leaflet of the plasma membrane
19. Distribution of intrinsic proteins in the plasma membrane is
(a) Random
(b) Symmetrical
(c) Asymmetrical
(d) None
Answer
Answer: (c) Asymmetrical
20. Select a foodborne toxin
(a) Botulinum toxin
(b) Tetanus Toxin
(c) Diphtheria toxin
(d) Cholera Toxin
Answer
Answer: (a) Botulinum toxin