Chapter 6 – Biomolecules,

14 Nov 2020 3:56 pm

Balbharati, solutions, for, Biology, 11th, Standard, Maharashtra, State Board, Chapter 6, Biomolecules, Exercise, [Pages 74 – 75

Exercise | Q 6 | Page 75

If double-stranded DNA has 14% C (cytosine) what percent A (adenine), T (thymine) and G (gaunine) would you expect?

SOLUTION

A purine always pairs with pyrimidine.

Adenine pairs with thymine and cytosine pairs with guanine.

Therefore, as per the given data

If cytosine = 14% then guanine = 14%.

According to Chargaff’s rule,

(C+G) = 14 + 14 = 28%

Therefore, (A+T) = 72%

So, A= 36%, T= 36%, G = 14%.

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