Answer: RNA polymerase.
- A DNA polymerase
- B RNA polymerase
- C Reverse transcriptase
- D DNA ligase
Correct answer: B. RNA polymerase
Explanation: RNA polymerase catalyses the synthesis of RNA using a DNA template during transcription.
Helicase unwinds the double helix at the replication fork; one new strand (leading) is synthesised continuously toward the fork, while the other (lagging) must be made in short, separate Okazaki fragments because DNA polymerase only adds nucleotides 5'→3'.
Concept context
DNA structure, replication, transcription, translation, the genetic code, and gene regulation (lac operon). The single most important chapter for NEET molecular biology.