Answer: codon.
- A codon
- B whole gene
- C anticodon
- D operon
Correct answer: A. codon
Explanation: A codon is a triplet of mRNA bases specifying one amino acid.
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.