MHT CET · BIOLOGY · STD 11 - 6. Biomolecules
A 340 Å long segment of DNA molecule has 20 thymine nitrogenous bases, what will be the number of guanine nitrogen bases in the same segment?
- A 10
- B 40
- C 80
- D 160
Answer & Solution
Correct Answer
(C) 80
Step-by-step Solution
Detailed explanation
In a DNA molecule, adenine pairs with thymine, so if there are 20 thymine bases, there will also be 20 adenine bases. The remaining bases will be guanine and cytosine. Since the segment is 340 Å long, it corresponds to 100 base pairs, and out of those 100 bases, 20 are thymine and 20 are adenine, leaving 80 bases for guanine and cytosine.
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