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Previous year question hub

Gene Expression and Its Regulation, and DNA Repair - Life Sciences Previous Year Questions

Practice Gene Expression and Its Regulation, and DNA Repair - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

20Papers
20Years
63Questions
1Topics

Gene Expression and Its Regulation, and DNA Repair question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Gene Expression and Its Regulation, and DNA Repair. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 33 52.4%
Medium 30 47.6%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 51 81%
MSQ 10 15.9%
Numerical Answer Type (NAT) 2 3.2%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
63 Qs

Most asked topics

Top topics across the included previous year papers.

Gene Expression and Its Regulation, and DNA Repair
63 Qs

Subtopic coverage

Top subtopics inside this exact selection.

DNA Repair and Gene Regulation
32 Qs
Replication, Transcription and Translation
31 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Life Sciences (XL) 2026
5 Qs
Life Sciences (XL) 2025
3 Qs
Life Sciences (XL) 2024
7 Qs
Life Sciences (XL) 2023
2 Qs
Life Sciences (XL) 2022
1 Qs
Life Sciences (XL) 2021
2 Qs
Life Sciences (XL) 2020
1 Qs
Life Sciences (XL) 2019
1 Qs
Life Sciences (XL) 2018
1 Qs
Life Sciences (XL) 2017
1 Qs
Life Sciences (XL) 2016
3 Qs
Life Sciences (XL) 2015
4 Qs
Life Sciences (XL) 2014
5 Qs
Life Sciences (XL) 2013
4 Qs
Life Sciences (XL) 2012
1 Qs
Life Sciences (XL) 2011
3 Qs
Life Sciences (XL) 2010
3 Qs
Life Sciences (XL) 2009
5 Qs
Life Sciences (XL) 2008
5 Qs
Life Sciences (XL) 2007
6 Qs

Browse by subtopics

Open a focused page built from the same verified paper data.

DNA Repair and Gene Regulation

Explore previous-paper coverage, trends and focused practice for DNA Repair and Gene Regulation.

32 questions17 papers17 years

Replication, Transcription and Translation

Explore previous-paper coverage, trends and focused practice for Replication, Transcription and Translation.

31 questions14 papers14 years

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 202620265View paper
Life Sciences (XL) 202520253View paper
Life Sciences (XL) 202420247View paper
Life Sciences (XL) 202320232View paper
Life Sciences (XL) 202220221View paper
Life Sciences (XL) 202120212View paper
Life Sciences (XL) 202020201View paper
Life Sciences (XL) 201920191View paper
Life Sciences (XL) 201820181View paper
Life Sciences (XL) 201720171View paper
Life Sciences (XL) 201620163View paper
Life Sciences (XL) 201520154View paper
Life Sciences (XL) 201420145View paper
Life Sciences (XL) 201320134View paper
Life Sciences (XL) 201220121View paper
Life Sciences (XL) 201120113View paper
Life Sciences (XL) 201020103View paper
Life Sciences (XL) 200920095View paper
Life Sciences (XL) 200820085View paper
Life Sciences (XL) 200720076View paper

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2007 · Life Sciences · Gene Expression and Its Regulation, and DNA Repair · Replication, Transcription and Translation
Life Sciences (XL) 2007
A nonsense mutation in the gene encoding protein X leading to the synthesis of a truncated protein results in a slow growing strain. Mutagenesis of this strain towards the isolation of extragonice suppressors led to the isolation of a strain which grew normally and synthesized the full-length protein X. The extragonice suppressor is likely to be a gene coding for
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2
2008 · Life Sciences · Gene Expression and Its Regulation, and DNA Repair · Replication, Transcription and Translation
Life Sciences (XL) 2008

Transcription initiation sites can be determined by

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3
2009 · Life Sciences · Gene Expression and Its Regulation, and DNA Repair · DNA Repair and Gene Regulation
Life Sciences (XL) 2009

When E.coli is grown in glucose and lactose, the lac operon is not expressed. This is because glucose interferes with

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4
2010 · Life Sciences · Gene Expression and Its Regulation, and DNA Repair · DNA Repair and Gene Regulation
Life Sciences (XL) 2010

In tryptophan operon, tryptophan acts as

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5
2011 · Life Sciences · Gene Expression and Its Regulation, and DNA Repair · DNA Repair and Gene Regulation
Life Sciences (XL) 2011

Catabolite repression allows cells to save energy by

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6
2012 · Life Sciences · Gene Expression and Its Regulation, and DNA Repair · DNA Repair and Gene Regulation
Life Sciences (XL) 2012
An E.coli mutant constitutive for the lac operon was mated with a wild type strain. The merodiploid thus obtained was inducible by lactose. This observation indicates that the original mutation is
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