Botany-DNA Structure
NEET Botany DNA Structure MCQ Question
Type: MCQ-numerical-Medium-Class 12
If the length of the DNA double helix in a typical mammalian cell is approximately 2.2 meters, and the distance between two consecutive base pairs is 0.34 nm, how many base pairs are present in the DNA of the mammalian cell?
A
6.6 billion
B
2.2 billion
C
0.34 billion
D
13.2 billion
Correct Answer
Option A
Detailed Explanation
The length of the DNA double helix is 2.2 meters, and the distance between two base pairs is 0.34 nm. By dividing 2.2 meters by 0.34 nm (converted to meters), you get approximately 6.6 billion base pairs.
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