Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).<br>Assertion: The enzymatic degradation of cell wall to obtain single cell called protoplast has helped immensely in developing somatic cell genetics in plants.<br>Reason: In plants or animals, fusion of two cells must occur through the plasma membrane.

An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.

A

B

D

C

B

D

C

Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.

A

Q only

B

Q and S only

C

P, Q and S only

D

P, Q, R and S

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: It is possible to regenerate a whole plant from a single plant cell.
Reason: It is easier to introduce transgenes into plants than animals.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true but (R) is not the correct reason for (A)

C

Both (A) and (R) are false

D

(A) is true but (R) is false

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: Somatic embryogenesis in plants is a twostep process comprising of embryo initiation followed by embryo production.
Reason: Embryo initiation is independent of the presence of 2, 4-dichlorophenoxyacetic acid, whereas embryo production requires a high concentration of 2, 4-dichlorophenoxyacetic acid.

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 true but (R) is false

D

(A) is false but (R) is true

Which of the following statements are correct regarding the general difference between cell and nuclear membranes? 1. A cell membrane occurs in both Eukaryotes and Prokaryotes while a Nuclear membrane occurs only in Eukaryotes. 2. Both cell membrane and nuclear membrane persists throughout the lifetime of a cell. 3. The main feature of the nuclear membrane is the presence of two lipid bilayer structures while a cell membrane has single lipid bilayer structures. Select the correct answer using the code given below.

A

1 and 2 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: MTT assay is used to determine cell viability based on the principle of color formation by DNA fragmentation.
Reason: MTT assay is used to determine cell viability based on the color development by converting tetrazolium soluble sail to insoluble salt.

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 true but (R) is false

D

(A) is false but (R) is true

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: In synchronous culture, majority of the cells move to next phase of the cell cycle simultaneously.
Reason: Synchronous culture could be obtained by starving cells for essential nutrient components.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true but (R) is not the correct reason for (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

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

Determine the correctness or otherwise of the following Assertion (A) and Reason (R).
Assertion: Bacterial growth is called synchronous when majority of the cells are in same stage of the bacterial cell cycle.
Reason: Synchronous culture can be obtained by growing bacteria in an enriched medium

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true but (R) is not the correct reason for (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Which of the following statements are correct regarding common differences between plant and animal cells?
1. Plant cells have cellulose cell wall, while animal cells lack it.
2. Plant cells lack plasma membrane, while animal cells have it.
3. Mature plant cell have a large vacuole, while animal cells have numerous small vacuoles.

A

1 and 2

B

2 and 3

C

1 and 3

D

1, 2 and 3

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