Explore topic-wise MCQs in Cell Biology.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

ATP biosynthesis takes place utilizing the H+ gradient in mitochondria and chloroplasts. Identify the correct sites of H+ gradient formation.

A. Across the outer membrane of mitochondria and across the inner membrane of chloroplast
B. Across the inner membrane of mitochondria and across the thylakoid membrane of chloroplast
C. Within the matrix of mitochondria and across the inner membrane of chloroplast
D. Within the matrix of mitochondria and within the stroma of chloroplast
Answer» C. Within the matrix of mitochondria and across the inner membrane of chloroplast
Discussion
2.

Determine the correctness or otherwise of the following Assertion (a) and the Reason (r)
Assertion : Cytoplasmic male sterility (cms) is invariably due to defect(s) in mitochondrial function.
Reason : cms can be overcome by pollinating a fertility restoring (Rf) plant with pollen from a non cms plant.

A. both (a) and (r) are true and (r) is the correct reason for (a)
B. both (a) and (r) are true and (r) is not the correct reason for (a)
C. (a) is false but (r) is true
D. (a) is true but (r) is false
Answer» B. both (a) and (r) are true and (r) is not the correct reason for (a)
Discussion
3.

Determine the correctness or otherwise of the following Assertion (A) and Reason (R).
Assertion: Plants convert fatty acids into glucose.
Reason: Plants have peroxisomes.

A. Both (A) and (R) are true but (R) is not the correct reason for (A)
B. Both (a) and (R) are true and (R) is the correct reason for (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true
Answer» B. Both (a) and (R) are true and (R) is the correct reason for (A)
Discussion
4.

Identify the following antibiotics with their modes of action.
Antibiotic
A. Ampicillin
B. Tetracycline
C. Nystatin
D. Anthramycin
Mode of action
1. inhibition of protein synthesis
2. inhibition of cell wall synthesis
3. damage to cytoplasmic membrane
4. damage to DNA structure

A. A 1, B 2, C 4, D 3
B. A 2, B 1, C 3, D 4
C. A 1, B 2, C 3, D 4
D. A 3, B 4, C 2, D 1
Answer» C. A 1, B 2, C 3, D 4
Discussion