NEET UG 2019 · Botany · Question 166
NEET 2019 Botany, question 166
Question 166 of the NEET 2019 paper (code P1) is a Botany question from Molecular Basis of Inheritance. Its idea, lac z, y and a Gene Products, was asked 3 times, in 2019, 2023 and 2024, across NEET 2017–2026. The NTA final answer key gives option 3.
Updated 2026-10-08
Q166 · Botany
Match the following genes of the Lac operon with their respective products :
| (a) i gene | (i) β-galactosidase |
| (b) z gene | (ii) Permease |
| (c) a gene | (iii) Repressor |
| (d) y gene | (iv) Transacetylase |
Select the correct option.
- 1(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
- 2(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
- 3(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)Official answer
- 4(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
Official answer: option 3 · NTA final answer key
Same idea
lac z, y and a Gene Products, in other papers
NEET asked this idea 3 times, in 2019, 2023 and 2024. The other 2 questions below.
- 2024 Q101The lactose present in the growth medium of bacteria is transported to the cell by the action of:One-line MCQ · Medium
- 2023 Q151Match List I with List II. List I | List II A. Gene 'a' | I. β-galactosidase B. Gene 'y' | II. Transacetylase C. Gene 'i' | III. Permease…Match the lists · Easy
lac z, y and a Gene Products: 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.