Question

which of the following is true about dna replication? enzymes break the hydrogen bonds between the nitrogenous bases to separate the two strands of dna. dna replication allows for the formation of hydrogen bonds to copy two old strands of dna. dna polymerase is an enzyme that works to transport dna from the nucleus to the cytoplasm. the double helix results from two old strands of dna fused together to form two new strands.

Explanation:

In DNA replication, enzymes like helicase break the hydrogen - bonds between nitrogenous bases to separate the two strands of the DNA double - helix. This is the first step in the replication process. DNA replication does not involve forming hydrogen bonds to copy two old strands; rather, new complementary strands are synthesized. DNA polymerase is involved in synthesizing new DNA strands, not transporting DNA from the nucleus to the cytoplasm. The double - helix is not formed by fusing two old strands to form two new strands; instead, each old strand serves as a template for the synthesis of a new complementary strand.

Answer:

A. Enzymes break the hydrogen bonds between the nitrogenous bases to separate the two strands of DNA.