NEET UG 2024 · Zoology · Question 169
NEET 2024 Zoology, question 169
Question 169 of the NEET 2024 paper (code T2) is a Zoology question from Biotechnology: Principles and Processes. Its idea, Origin of Replication (ori), was asked 4 times, in 2020, 2024 and 2026, across NEET 2017–2026. The NTA final answer key gives option 4.
Updated 2026-10-08
Q169 · Zoology
The following diagram showing restriction sites in E.coli cloning vector pBR322. Find the role of 'X' and 'Y' genes:
The figure, described in words
Circular cloning vector pBR322 with sites EcoR I, Cla I, Hind III, Pvu I, Pst I, BamH I, Sal I, Pvu II; genes/regions X and Y marked on the circle
- 1The gene 'X' is for protein involved in replication of Plasmid and 'Y' for resistance to antibiotics.
- 2Gene 'X' is responsible for recognition sites and 'Y' is responsible for antibiotic resistance.
- 3The gene 'X' is responsible for resistance to antibiotics and 'Y' for protein involved in the replication of Plasmid.
- 4The gene 'X' is responsible for controlling the copy number of the linked DNA and 'Y' for protein involved in the replication of Plasmid.Official answer
Official answer: option 4 · NTA final answer key
Same idea
Origin of Replication (ori), in other papers
NEET asked this idea 4 times, in 2020, 2024 and 2026. The other 3 questions below.
- 2026 Q180Match List-I with List-II. List-I | List-II A. Transformation | I. Restriction enzyme B. Cloning site | II. Transfer DNA to host bacteria…Match the lists · Easy
- 2024 Q133What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism? A. The piece of DNA would…Other · Medium
- 2020 Q78The sequence that controls the copy number of the linked DNA in the vector, is termed :One-line MCQ · Easy
Origin of Replication (ori): every question and how it was framed
The chapter
Biotechnology: Principles and Processes in ten years of NEET
46 questions from 2017–2026, asked in 10 of 10 papers, about 4.4 a paper. Cloning Vectors alone had 18.