NEET2020Botany-Molecular Basis of Inheritance
NEET 2020 Botany DNA Structure MCQ Question
Type: MCQ-numerical-Medium-Class 12
If the distance between two consecutive base pairs is 0.34 nₘ and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10⁹ bp, then the length of the DNA is approximately:
A
2.2 meters
B
2.7 meters
C
2.0 meters
D
2.5 meters
Correct Answer
Option A
Detailed Explanation
The length of DNA is calculated by multiplying the number of base pairs by the distance between them: 6.6 × 10⁹ bp × 0.34 nₘ = 2.2 meters.
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