Question

When replication is complete, how do the 2 new DNA molecules compare to each other and the original DNA molecule?

Answer 1

DNA is double-stranded, nucleotides in one strand of the DNA is complementary to the nucleotides in the other strand.

DNA replication is semiconservative, that is one strand in the parent double-stranded DNA molecule is used as the template for the synthesis of new DNA molecule, and DNA polymerase adds nucleotides complementary to the template strand.so the newly synthesized DNA molecules will have the same sequence as that of the parent double-stranded DNA.

2 new DNA molecules and the original DNA molecule has the same nucleotide sequence in both strands. The 2 new DNA molecules have one strand from the parental DNA and one newly synthesized strand, the parent strand and newly synthesized strand in the new DNA molecules are different in both new DNA molecules.