Question

Which statement is true of DNA?
It is used by ribosomes for translation.
Successive nucleotides in a strand are connected by hydrogen bonds.
A phosphate group in a nucleotide is attached to the 3' carbon in ribose.
A purine always forms a complementary base pair with a pyrimidine.
The percentage of the purine A always equals the percentage of the purine G.

Answer 1

Answer:

A purine always forms a complementary base pair with a pyrimidine.

Explanation:

Purine bases such as Adenine pair specifically with Thymine , a pyrimidine base forming two bonds; just as Guanine pair specifically with Cytosine forming three bonds.

This specific base pairing are complimentary in nature and grants stability to the DNA.