Question

Which of the following pairs of dinucleotides are present in equal amounts in DNA?

A. CC and GG

B. CG and GT

C. CA and TG

D. CG and AT

E. GT and CA

F. TA and AT

Short answer

The dinucleotides from pair ‘A’ CC and GG and pair ‘C’ CA and TG are present in equal amounts in DNA.

Step-by-step solution

Step-by-Step SolutionStep 1: Dinucleotides

A nucleotide is classified as mononucleotide, dinucleotide, trinucleotide, etc.A dinucleotide is a compound comprised of two nucleotides. There are a total of 16 pairs of nucleotides possible.A nucleotide is composed of nucleobase, pentose sugar, and phosphoric acid.

Dinucleotide pairs

There are a total of 16 pairs of nucleotides possible. The 16 pairs are as follows;

AT, AA, AC, AG, TT, TA, TC, TG, GT, GA, GC, GG, CT, CA, CC, CG.

The dinucleotides from pair ‘A’ CC and GG and pair ‘C’ CA and TG are present in equal amounts in DNA.

CA and TG form in equal amount since A pairs with T and C pairs with G as we know that dinucleotide are written in the$5\text{'}\to 3\text{'}$ directions.