Question

DNA replication is semi-conservative in that?

1) The two strands of the original helix are not conserved, but the base sequence in the DNA is preserved.
2) DNA replication can only follow the replication fork on the leading strand.
3) The base sequence of a DNA molecule is conserved, with very high fidelity, in DNA replication.
4) The two strands of the original helix are conserved, but they become part of separate progeny DNAs.

Answer 1

DNA replication is semi-conservative, with each new DNA molecule containing one parental strand and one new strand. Option 4 is correct.

Step-by-step explanation:

DNA replication is semi-conservative because each of the new DNA molecules formed contains one original (parental) strand and one newly synthesized strand. When DNA replicates, the original double helix unwinds, and each strand serves as a template for the formation of a new complementary strand.

The correct statement regarding DNA replication is that 'The two strands of the original helix are conserved, but they become part of separate progeny DNAs,' as each daughter DNA will consist of one parental strand and one newly made strand.

DNA replication is a process where each of the two strands of the DNA helix serves as a template for the synthesis of a complementary new strand. The new strands are copied from the original strands, resulting in two daughter DNA molecules. This process is known as semi-conservative replication because each daughter DNA molecule contains one strand from the original parental molecule and one newly synthesized strand.