Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion (A): DNA fragments can be isolated by Gel electrophoresis on the basis of their size.
Reason (R): The larger the fragment size, the faster it moves.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true and R is not the correct explanation of A.
✓
A is true but R is false.
D
A is False but R is true.

Answer

Correct option: C.

A is true but R is false.

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MCQ 21 Mark

Assertion (A): A floating cover placed over the slurry in a biogas plant keeps on rising.
Reason (R): This cover keeps on rising due to the gas produced in the tank by the microbial activity.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true and R is not the correct explanation of A.
C
A is true but R is false.
D
A is False but R is true.

Answer

Both A and R are true and R is correct explanation of A.

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MCQ 31 Mark

Assertion (A): Deoxyribonucleoside triphosphates serve dual purposes.
Reason (R): They act as proof readers and provide energy.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true and R is not the correct explanation of A.
✓
A is true but R is false.
D
A is False but R is true.

Answer

Correct option: C.

A is true but R is false.

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MCQ 41 Mark

Assertion (A): Cells of tapetum have more than one nucleus.
Reason (R): They undergo meiosis without cytokinesis.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true and R is not the correct explanation of A.
✓
A is true but R is false.
D
A is False but R is true.

Answer

Correct option: C.

A is true but R is false.

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Biology Assertion (A) & Reason (B) MCQ

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