Question

Each of the DNA molecule formed after replication is composed of

• A. one parental strand and one newly synthesized strand
• B. two parental strands
• C. two newly synthesized strands
• D. two strands with variable proportion of parental and newly synthesized strand

Answer 1

The correct option is A one parental strand and one newly synthesized strand

In a double stranded DNA, both the strands get separated and one new complementary strand is synthesized on each parental strand. Thus each of the new double stranded DNA molecule formed after replication will consists of one parental strand and one newly synthesized strand. This method of replication is known as semi-conservative replication.
1 DNA molecule formed after replication = 1 parental strand + 1 newly synthesized strand