Question

When the DNA replication starts, the

• A. Leading strand produces Okazaki fragment
• B. Hydrogen bonds between the nucleotides of two strand break
• C. Phosphodiester bond between the adjacent nucleotide break
• D. Bonds between the nitrogen base and deoxyribose sugar break

Answer 1

The correct option is B Hydrogen bonds between the nucleotides of two strand break

During DNA replication breaking of H-bond is required to uncoil the DNA. When the DNA replication starts, the parent DNA double helix uncoils and splits into single DNA strands by breakdown of hydrogen bonds.