- A The i gene
- B The z gene
- C The y gene
- D The a gene
Correct answer: B. The z gene
Explanation: The z gene of the lac operon codes for beta-galactosidase, which hydrolyses lactose into glucose and galactose.
Concept context
DNA structure, replication, transcription, translation, the genetic code, and gene regulation (lac operon). The single most important chapter for NEET molecular biology.