When DNA replication starts

Question

When DNA replication starts (A) the leading strand produces Okazaki fragments (B) the hydrogen bonds between the nucleotides of two strands break (C) the phosphodiester bonds between the adjacent nucleotides break (D) the bonds between the nitrogen base and deoxyribose sugar break

Tardigrade Admin · Accepted Answer

On starting of DNA replication, the two strands of DNA double helix unwind with the help of DNA unwinding protein (also called DNA helicase). The unwinding occurs as this protein begins its binding DNA strands, thus, breaking the hydrogen bonds between complementary nitrogenous bases.

Q. When DNA replication starts

the leading strand produces Okazaki fragments

the hydrogen bonds between the nucleotides of two strands break

the phosphodiester bonds between the adjacent nucleotides break

the bonds between the nitrogen base and deoxyribose sugar break

On starting of DNA replication, the two strands of DNA double helix unwind with the help of DNA unwinding protein (also called DNA helicase). The unwinding occurs as this protein begins its binding DNA strands, thus, breaking the hydrogen bonds between complementary nitrogenous bases.