In DNA replication,
A) parental DNA shatters into pieces, and joins with newly-synthesized pieces to fashion two double helices from one.
B) parental DNA remains intact but guides formation of new double helices.
C) the parental DNA splits and free nucleotides bond to their complements, building two DNA molecules from one.
D) an entirely new double helix is built using information in the sequence of amino acids.
E) DNA taken into the body in the diet enters cells and joins the DNA.

Question

Quizplus · Accepted Answer

During DNA replication, the parental DNA molecule is separated into two complementary strands. Each strand serves as a template for the synthesis of a new complementary strand, during which free nucleotides pair up with their complementary bases on the template strand. This results in the formation of two identical DNA molecules from one original molecule. The parental DNA remains intact and guides the formation of new double helices. Option A and D are incorrect as they do not accurately describe the process of DNA replication. Option E is incorrect as DNA from food cannot enter the cells and join the cellular DNA.

In DNA Replication