Which enzyme is responsible for DNA replication?

• A. RNA polymerase
• B. Ligase
• C. DNA polymerase
• D. Helicase

Answer: (C)

DNA polymerase is the key enzyme responsible for DNA replication. Its primary function is to synthesize new strands of DNA by adding nucleotides complementary to the template strand. During DNA replication, DNA polymerase requires a primer to provide a starting point for the synthesis and can only add nucleotides in the 5’ to 3’ direction.

This enzyme plays a critical role in ensuring that the genetic information is accurately copied and passed on during cell division. DNA polymerase also has proofreading capabilities, which helps maintain the fidelity of DNA replication by correcting any mistakes made during the synthesis process. The other enzymes listed, while important in different contexts of DNA and RNA metabolism, do not directly carry out the replication of DNA.