Botany-DNA Structure
NEET Botany DNA Structure Assertion Reason Question
Type: Assertion Reason-assertion-Easy-Class 12
Assertion (A): The length of a DNA double helix in a mammalian cell is approximately 2.2 meters. | Reason (R): DNA is a long polymer of deoxyribonucleotides, and its length is defined by the number of nucleotides present in it.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.
Correct Answer
Option A
Detailed Explanation
The NCERT context explains that DNA's length is due to the polymer nature of deoxyribonucleotides, which accounts for its extended length in cells.
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