Which of the following statements describes each new molecule of DNA

produced when DNA replicates?

A. Each new molecule is half the length of the original molecule.

B. Each new molecule has only the coding portions of the original molecule in its

sequence.

C. Each new molecule contains one strand from the original molecule and one newly

synthesized strand.

D. Each new molecule retains the A, C, and G bases in the DNA sequence but replaces

the T base with U.

Answer:C). Each new molecule contains one strand from the original molecule and one newly

synthesized strand.

Explanation: DNA replication is semiconservative. This means that each strand of the double-stranded DNA molecule serves as a template for the synthesis of a new strand. Each of the two double-stranded DNA molecules during replication contains one old strand and one new strand.

Before DNA polymerase begins replication, an enzyme known as helicase unwinds the double-stranded helical DNA molecule to create access to each strand so that each strand will serve as a template for the synthesis of a new strand.

Answer: C. Each new molecule contains one strand from the original molecule and one newly synthesized strand.