Question

Which of the following statements best describes the replication of DNA?

a. The double helix unzips the hydrogen bonds between bases and like bases pair up (G with G, C with C, etc.)

b. The double helix unzips at the phosphate bonds and new nucleotides pair with the appropriate sugars.

c. The double helix unzips the hydrogen bonds between bases and new DNA nucleotides pair with the complementary bases in the old strands.

d. The double helix unzips and RNA forms base pairs with the complimentary strand of DNA.

Answer 1

Answer:

By hydrogen bonds between nucleotide bases

Explanation:

A DNA molecule is a double-stranded molecule that is informing one structure two strands of nucleotide are involved.

The double-stranded molecule backbone is composed of the phosphate and sugar group and the inside of the backbone are presents the nitrogenous bases. The nitrogenous bases are of four types which are: adenine, cytosine, guanine, and thymine.

These nitrogenous bases are attached according to the Chargaff rule that is adenine binds thymine and cytosine binds guanine. These bases bind with the help of the hydrogen bond as 2 hydrogens participate between adenine and thymine and 3 hydrogens participate between cytosine and guanine.

Thus, hydrogen bonds between nucleotide bases is correct.