Question

If a DNA molecule is replicated once to produce two daughter DNA molecules. According to semiconservative replication mechanism, which of the following is a correct description about the two daughter DNA molecules?

-all strands of the daughter DNA molecules are newly synthesized.

-one strand of each daughter DNA is newly synthesized, the other strand of each daughter DNA molecule is from the parental DNA. The two strands from the parental DNA are identical

-one daughter DNA molecule is newly synthesized, the other daughter DNA molecule is from the parental DNA.

-one strand of each daughter DNA is newly synthesized, the other strand of each daughter DNA molecule is from the parental DNA. The two strands from the parental DNA are complementary to each other.

-in each strand of the daughter DNA molecules, part is newly synthesized and part is from the parental DNA.

Answer 1

In semiconservative replication, one strand of each daughter DNA molecule is new, and the other is from the original parental DNA, with the two parental strands being complementary to each other.

Step-by-step explanation:

According to the semiconservative replication mechanism, when a DNA molecule is replicated once to produce two daughter DNA molecules, the correct description is that one strand of each daughter DNA is newly synthesized, while the other strand of each daughter DNA molecule comes from the parental DNA. The two strands from the parental DNA molecule are complementary to each other. This means that in each of the two resulting daughter DNA molecules, there is a blend of old and new: each daughter DNA contains one strand that is "new" and one strand that is part of the original DNA molecule.