Answer: Avery, MacLeod and McCarty.
- A Hershey and Martha Chase
- B Avery, MacLeod and McCarty
- C Watson, Crick and Wilkins
- D Meselson and F. Stahl
Correct answer: B. Avery, MacLeod and McCarty
Explanation: Avery, MacLeod and McCarty showed that DNA, not protein or RNA, was the transforming material responsible for Griffith's results.
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.