Question

Assume that a DNA double helix contains 100 base pairs (one pair is A-T or C-G) and there are 45 cytosines.
a. How many guanines are there?
b. How many adenines are there?

Answer 1

Cytosine(C) binds with Guanine(C)

Adenine(A) binds with Thymine(T)

a.From here we can deduct that there are the same number of nucleotides of guanine that as cytosine=>G=45 base pairs

b.2A=100-G-C

   2A=100-90 2A=10 A=5 base pairs