Question

quzilet Which of the following occurs when DNA is replicated? Group of answer choices One strand of the parent DNA is preserved; the other is destroyed. The two strands of the parent DNA are separated and then recombined before being passed on to the daughter cell. The two strands of the parent DNA are separated, and two daughter DNA strands are formed. Each of the two strands of parent DNA is reordered through the process of linkage, adding significant variation to the daughter cells.

Answer 1

DNA replication is a semiconservative process where each strand of the parent DNA serves as a template for a new strand, resulting in two daughter DNA molecules that are identical to the parent molecule.

Step-by-step explanation:

During DNA replication, the two strands of the parental DNA double helix separate and each strand serves as a template for the construction of a new complementary strand. This process is known as semiconservative replication because each new DNA molecule consists of one parental strand and one newly synthesized daughter strand. As a result, the two daughter DNA molecules have the same nucleotide sequence as the original parental molecule and are equally divided into the daughter cells. This precision is critical for maintaining genetic consistency throughout cell division and organismal growth. Additionally, enzymes such as DNA polymerase play a vital role in adding nucleotides to the growing DNA strand and proofreading to minimize replication errors.

Answer 2

The two strands of the parent DNA are separated, and two daughter DNA strands are formed.

Step-by-step explanation:

DNA replication is a complex process which replicates or produces new DNA molecule from the parent DNA molecule mediated by enzymes and ATP.

The mechanism of DNA replication is known as the semi-conservative mode in which one new strand of DNA is synthesized complementary to the one strand of DNA. To form a new DNA molecule both the strand of the DNA gets separated and then a new daughter strand is formed complementary to each parent strand.

Thus, the selected option is correct.