Cell Biology Multiple Choice Questions MCQs with Answers

1. Cell biology began with the discovery of the cell in 1665 by:
a. Loren Oken
b. Robert Brown
c. Robert Hooke
d. Schleiden
Answer: c. Robert Hooke

2. What is the work performed by Schleiden in cell biology?
a. Write Micrographia
b. Cell Theory
c. Discovered cell
d. Discovered nucleus
Answer: b. Cell Theory

3. How many basic components of a cell are there?
a. Two
b. Three
c. Four
d. Five
Answer: b. Three

4. Cell membrane is chemically composed of 40-60% of…?
a. Fats
b. Sugar
c. Lipids
d. Cytosol
Answer: c. Lipids

5. What kind of particles are engulfed by pinocytosis?
a. Solid
b. Liquid
c. Solid and liquids
d. Gaseous
Answer: b. Liquid

6. Which of the following is the outer most boundary in most of the plant cell?
a. Cell wall
b. Cell membrane
c. Plasma membrane
d. Lamella
Answer: a. Cell wall

7. The nucleus and the cytoplasm, two collectively form:
a. Gel
b. Sol
c. Lamella
d. Protoplasm
Answer: d. Protoplasm

Recommended: Cell Biology Practice Test

8. How many morphological forms of endoplasmic reticulum are there?
a. 1
b. 2
c. 3
d. 4
Answer: b. 2

9. What is the soluble part of cytoplasm called?
a. Cisternae
b. Endocytosis
c. Cytosol
d. Solplasm
Answer: c. Cytosol

10. Which of the following modifies proteins and lipids by adding carbohydrates?
a. Golgi apparatus
b. Plasma membrane
c. Polysome
d. None of these
Answer: a. Golgi apparatus

11. A group of ribosomes attached to a single strand of RNA is known as…?
a. Ribosomes
b. Nucleosomes
c. Lysosomes
d. Polysome
Answer: d. Polysome

12. Detoxification of harmful drugs and harmful chemicals within the cell is done by:
a. Nucleolus
b. Rough ER
c. Smooth ER
d. Food vacuoles
Answer: c. Smooth ER

13. Which organelle modifies proteins and lipids by adding carbohydrates?
a. The endoplasmic reticulum
b. Nucleus
c. Ribosomes
d. Chloroplasts
Answer: a. The endoplasmic reticulum

14. The membrane around the vacuole is known as…?
a. Tonoplast
b. Elaioplast
c. Cytoplast
d. Amyloplast
Answer: a. Tonoplast

15. Microfilaments are composed mainly of a protein known as:
a. Tubulin
b. Actin
c. Actor
d. Chitin
Answer: b. Actin

16. The cell wall of a plant cell is mainly made up of:
a. Protein
b. Cellulose
c. Lipid
d. Starch
Answer: b. Cellulose

17. Lysosomes are known as suicidal bags because of…?
a. Parasitic activity
b. Presence of food vacuole
c. Hydrolytic activity
d. Catalytic activity
Answer: c. Hydrolytic activity

18. The cell membrane fluidity 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: a. Increase in unsaturated fatty acids in the membrane

19. What determines the resting membrane potential?
a. Potassium-ion gradient
b. Sodium-ion gradient
c. Bicarbonate-ion gradient
d. None of these
Answer: a. Potassium-ion gradient

20. The oxygen and carbon dioxide move across the cell membrane by the process of…?
a. Active diffusion
b. Facilitated diffusion
c. Random diffusion
d. Passive diffusion
Answer: d. Passive diffusion

21. A plant cell without a cell wall is known as…?
a. Tonoplast
b. Symplast
c. Apoplast
d. Protoplast
Answer: d. Protoplast

22. Choose the correct statement regarding the function of the centrosome:
a. Formation of spindle fibers
b. Protein synthesis
c. Initiate cell division
d. Secretion
Answer: a. Formation of spindle fibers

23. What is the percentage of intrinsic proteins in the total proteins of the plasma membrane??
a. 90%
b. 70%
c. 10%
d. 50%
Answer: b. 70%

24. Which type of molecules will easily pass through the fatty acid chains of the bilayer??
a. Ions
b. Small hydrophobic molecules
c. Large hydrophilic molecules
d. Small polar molecules
Answer: b. Small hydrophobic molecules

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