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Question
A particular gene measures about 1 µm in length along a double-stranded DNA molecule. What is the approximate number of base pairs in this gene?
Options
3000
300
30
3
MCQ
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Solution
3000
Explanation:
1 µm = 1000 nm,
B-form DNA adjacent base pairs are spaced ≈ 0.34 nm apart,
So, the number of base pairs = `(1000 nm)/(0.34 nm)`
= 2941
= 3.0 × 103
= 3000
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