NEET UG 2018 · Botany · Question 158
NEET 2018 Botany, question 158
Question 158 of the NEET 2018 paper (code AA) is a Botany question from Molecular Basis of Inheritance. Its idea, Structure of the lac Operon, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 1.
Updated 2026-10-08
Q158 · Botany
All of the following are part of an operon except
- 1an enhancerOfficial answer
- 2structural genes
- 3an operator
- 4a promoter
Official answer: option 1 · CBSE official answer key
Same idea
The only question on Structure of the lac Operon
No other NEET paper from 2017–2026 tested this exact idea.
Structure of the lac Operon: every question and how it was framed
The chapter
Molecular Basis of Inheritance in ten years of NEET
61 questions from 2017–2026, asked in 10 of 10 papers, about 5.8 a paper. Gene Regulation and the lac Operon alone had 7.