Which of the following statements is true?
A) The hydrogen bonding of cytosine to guanine is an example of complementary base pairing.
B) In DNA, adenine always base pairs with guanine, and cytosine always base pairs with thymine.
C) Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base.
D) When adenine base pairs with thymine, they are linked by three hydrogen bonds.
E) None of these statements are true.

Question

Quizplus · Accepted Answer

Complementary base pairing refers to the specific hydrogen bonding between nucleotide bases in DNA, where adenine always pairs with thymine, and cytosine always pairs with guanine. The statement in option A correctly identifies the complementary base pairing of cytosine to guanine. Option B is incorrect as adenine base pairs with thymine, not guanine. Option C is incorrect as the four nucleotides have different nitrogen-containing base (adenine, guanine, cytosine, and thymine). Option D is incorrect as adenine and thymine are linked by two hydrogen bonds, not three.

Which of the Following Statements Is True