Answer: Watson and Crick.
- A Watson and Crick
- B Gregor Mendel
- C Charles Darwin
- D Jean Lamarck
Correct answer: A. Watson and Crick
Explanation: James Watson and Francis Crick described the DNA double helix in 1953.
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.