Cell Wall MCQ Questions and Answers
1. The cell wall is a rigid layer that surrounds the cells of_______
a) Animals
b) Plants
c) Both animals and plants
d) None of the above
2. Which of the following is the primary component of the plant cell wall?
a) Cellulose
b) Cholesterol
c) Hemoglobin
d) Keratin
3. The cell wall is absent in which of the following types of cells?
a) Prokaryotic cells
b) Animal cells
c) Plant cells
d) Fungal cells
4. In addition to cellulose, the plant cell wall may also contain other polymers, such as:
a) Starch
b) Glycogen
c) Lignin
d) Collagen
5. Which of the following is a function of the plant cell wall?
a) Regulation of cell shape
b) Protection against pathogens
c) Water and nutrient transport
d) All of the above
6. Which of the following is a characteristic feature of the fungal cell wall?
a) Chitin
b) Cellulose
c) Peptidoglycan
d) Collagen
7. The cell wall of bacteria is primarily composed of:
a) Cellulose
b) Cholesterol
c) Peptidoglycan
d) Lignin
8. The middle lamella is a layer that separates adjacent plant cells and is composed of:
a) Cellulose
b) Pectin
c) Lignin
d) Chitin
9. The fungal cell wall is involved in:
a) Cell shape determination
b) Protection against environmental stress
c) Nutrient uptake
d) All of the above
10. The primary function of the bacterial cell wall is to provide protection against:
a) Dehydration
b) Mechanical stress
c) Antibiotics
d) All of the above
11. Which of the following statements Is true regarding the cell wall in plant cells?
a) It is a flexible and elastic structure
b) It is selectively permeable
c) It is composed of a lipid bilayer
d) It provides shape and rigidity to the cell
12. The Gram-positive bacterial cell wall is primarily composed of:
a) Lipids
b) Peptidoglycan
c) Cellulose
d) Cholesterol
13. Which of the following is an example of a secondary cell wall component in plant cells?
a) Pectin
b) Cellulose
c) Lignin
d) Chitin
14. The cell wall of algae may contain additional polysaccharides, such as:
a) Starch
b) Chitin
c) Glycogen
d) Agar
15. The presence of a cell wall makes plant cells more resistant to bursting due to:
a) Osmotic pressure
b) DNA replication
c) Protein synthesis
d) ATP production
16. The primary cell wall in plant cells is composed of layers of cellulose fibers embedded in a matrix of:
a) Pectin
b) Lignin
c) Chitin
d) Collagen
17. The cell wall of diatoms, a type of algae, is composed of
a) Silica
b) Cellulose
c) Pectin
d) Chitin
18. The cell wall of bacteria acts as a barrier against which of the following?
a) Toxins
b) Phagocytosis
c) Antibiotics
d) All of the above
19. The middle lamella is composed of calcium pectate, which helps in:
a) Cell adhesion
b) Nutrient absorption
c) DNA replication
d) Protein synthesis
20. The cell wall of plant cells is permeable to water and small molecules, allowing for:
a) Cell division
b) Photosynthesis
c) Cell communication
d) Protein synthesis
21. The process of lignification involves the deposition of lignin in the plant cell wall, providing:
a) Increased flexibility
b) Enhanced rigidity
c) Improved nutrient absorption
d) Protection against pathogens
22. What gives the cell wall its rigidity and strength?
a) Proteins
b) Lipids
c) Carbohydrates
d) Nucleic acids
23. Which layer of the plant cell wall is responsible for strength and rigidity?
a) Primary cell wall
b) Secondary cell wall
c) Middle lamella
d) Pectin layer
24. The middle lamella is composed of:
a) Cellulose
b) Pectin
c) Lignin
d) Hemicellulose
25. The Gram-negative bacterial cell wall contains an outer membrane composed of:
a) Peptidoglycan
b) Lipopolysaccharides
c) Chitin
d) Glycogen
26. Which of the following cell walls can be lignified?
a) Plant cell walls
b) Bacterial cell walls
c) Fungal cell walls
d) Animal cell walls
27. The process of lignification involves the deposition of:
a) Lignin
b) Cellulose
c) Chitin
d) Pectin
28. The cell wall is located:
a) Inside the cell membrane
b) Outside the cell membrane
c) Within the cytoplasm
d) Within the nucleus
