Question

Given below are two statements:
Assertion (A): In tissue culture, explants are grown in test tube under sterile conditions in special nutrient medi
A.
Reason (R): The capacity to generate a whole plant from any cell or an explant is called totipotency.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Tissue culture depends on aseptic conditions, nutrient medium and the totipotency of plant cells.

Answer 1

The Correct Option is B

Concept:
Plant tissue culture is the technique of growing plant cells, tissues or organs under aseptic conditions on nutrient medium.

Step 1: Check Assertion.
In tissue culture, explants are grown under sterile conditions on special nutrient medium. \[ A \text{ is correct} \]

Step 2: Check Reason.
Totipotency is the ability of a cell or explant to regenerate a complete plant. \[ R \text{ is correct} \]

Step 3: Check explanation.
Reason explains the biological basis of regeneration, but it does not directly explain why explants are grown under sterile conditions in nutrient medium. \[ R \text{ is not the correct explanation of } A \] \[ \therefore \text{Correct Answer is (B)} \]