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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

Compare question counts across years.

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.

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Life Sciences (XL) 20262026
5 questions in this view
2026
Life Sciences (XL) 20252025
3 questions in this view
2025
Life Sciences (XL) 20242024
7 questions in this view
2024
Life Sciences (XL) 20232023
2 questions in this view
2023
Life Sciences (XL) 20222022
1 questions in this view
2022
Life Sciences (XL) 20212021
2 questions in this view
2021
Life Sciences (XL) 20202020
1 questions in this view
2020
Life Sciences (XL) 20192019
1 questions in this view
2019
Life Sciences (XL) 20182018
1 questions in this view
2018
Life Sciences (XL) 20172017
1 questions in this view
2017
Life Sciences (XL) 20162016
3 questions in this view
2016
Life Sciences (XL) 20152015
4 questions in this view
2015
Life Sciences (XL) 20142014
5 questions in this view
2014
Life Sciences (XL) 20132013
4 questions in this view
2013
Life Sciences (XL) 20122012
1 questions in this view
2012
Life Sciences (XL) 20112011
3 questions in this view
2011
Life Sciences (XL) 20102010
3 questions in this view
2010
Life Sciences (XL) 20092009
5 questions in this view
2009
Life Sciences (XL) 20082008
5 questions in this view
2008
Life Sciences (XL) 20072007
6 questions in this view
2007

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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