Question

Select the statements that correctly describe how a new DNA molecule reflects the original DNA molecule from which it was copied. Select the TWO answers that are correct.
a. DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original.
b. The nitrogenous bases in the new DNA molecule are A, T, G, and C, but the original molecule contains A, U, G, and C.
c. Each new DNA molecule contains an original strand and a newly synthesized strand.
d. The two DNA molecules are exact opposites of each other according to base pairs.
e. Base pairing rules duplicate the base pairs of the original molecule in the new molecule.

Answer 1

Answer:

a. DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original

c. Each new DNA molecule contains an original strand and a newly synthesized strand.

Explanation:

DNA replication is an important process every cell must undergo prior to division. DNA replication is the process whereby DNA content is doubled. It occurs as a result of an enzyme called DNA polymerase, which synthesizes nucleotides.

DNA replication follows the semi-conservative model which uses one original DNA strand to synthesize a new DNA strand. The double-stranded DNA is separated into two single strands which serve as template for new strands. Due to the action of DNA polymerase, DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original.

Also, each newly synthesized DNA molecule which is similar to one another contains an original strand (template) and a newly synthesized strand.