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Question
The distance between two consecutive DNA base pairs is 0.34 nm. If the length of a chromosome is 1 mm the number of base pairs in the chromosome is approximately
The distance between two consecutive DNA base pairs is 0.34 nm. If the length of a chromosome is 1 mm the number of base pairs in the chromosome is approximately
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Solution
The correct option is D 3 million
Distance between two consecutive base pairs = 0.34 nm; Since 1 nm = 1 x 10−6 mm, 0.34 nm = 0.34 x 10−6 mm. Number of total base pairs on 1 mm long DNA = 1/0.34 x 10−6 = 2.9 x 106 base pairs. Thus, option A is correct.
Distance between two consecutive base pairs = 0.34 nm;
Since 1 nm = 1 x 10−6 mm, 0.34 nm = 0.34 x 10−6 mm.
Number of total base pairs on 1 mm long DNA = 1/0.34 x 10−6 = 2.9 x 106 base pairs.
Thus, option A is correct.
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