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

Question

Quizplus · Accepted Answer

This statement is true as per Chargaff's rule, which states that the amount of A always equals the amount of T, and the amount of G always equals the amount of C in a DNA molecule. Since A and G are purines and T and C are pyrimidines, they always form complementary base pairs.

All other statements are false:
A) Successive nucleotides in a strand are connected by phosphodiester bonds, not hydrogen bonds.
B) A phosphate group in a nucleotide is attached to the 5' carbon in ribose, not the 3' carbon.
D) The percentage of A does not necessarily equal the percentage of G. 
E) Ribosomes use RNA, not DNA, for translation.

Which of the Following Is TRUE of DNA