Question

In semi-conservative DNA replication, each daughter DNA molecule contains:

Options

• Two newly synthesized strands

• Two parental strands from the original molecule

• A mixture of segments from both old and new strands

• One parental strand and one newly synthesized strand

Answer 1

Semi-conservative replication ensures that each daughter DNA molecule consists of one original parental strand serving as a template and one newly synthesized complementary strand. This mode was experimentally confirmed by Meselson and Stahl in 1958.