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Previous year question hub

Biochemistry and Molecular Biology - Life Sciences Previous Year Questions

Practice Biochemistry and Molecular Biology - Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

20Papers
20Years
261Questions
1Topics

Biochemistry and Molecular Biology question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Biochemistry and Molecular Biology. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 138 52.9%
Medium 121 46.4%
Hard 2 0.8%

Question type distribution

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

MCQ 198 75.9%
Numerical Answer Type (NAT) 42 16.1%
MSQ 21 8%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
261 Qs

Most asked topics

Top topics across the included previous year papers.

Biochemistry and Molecular Biology
261 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Biomolecules and Molecular Information Flow
173 Qs
Metabolism, Enzymes and Hormones
88 Qs

Paper coverage

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

Life Sciences (XL) 2026
17 Qs
Life Sciences (XL) 2025
11 Qs
Life Sciences (XL) 2024
13 Qs
Life Sciences (XL) 2023
12 Qs
Life Sciences (XL) 2022
9 Qs
Life Sciences (XL) 2021
17 Qs
Life Sciences (XL) 2020
17 Qs
Life Sciences (XL) 2019
11 Qs
Life Sciences (XL) 2018
15 Qs
Life Sciences (XL) 2017
16 Qs
Life Sciences (XL) 2016
13 Qs
Life Sciences (XL) 2015
4 Qs
Life Sciences (XL) 2014
10 Qs
Life Sciences (XL) 2013
11 Qs
Life Sciences (XL) 2012
13 Qs
Life Sciences (XL) 2011
13 Qs
Life Sciences (XL) 2010
11 Qs
Life Sciences (XL) 2009
15 Qs
Life Sciences (XL) 2008
17 Qs
Life Sciences (XL) 2007
16 Qs

Browse by subtopics

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

Biomolecules and Molecular Information Flow

Explore previous-paper coverage, trends and focused practice for Biomolecules and Molecular Information Flow.

173 questions20 papers20 years

Metabolism, Enzymes and Hormones

Explore previous-paper coverage, trends and focused practice for Metabolism, Enzymes and Hormones.

88 questions20 papers20 years

Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 2026202617View paper
Life Sciences (XL) 2025202511View paper
Life Sciences (XL) 2024202413View paper
Life Sciences (XL) 2023202312View paper
Life Sciences (XL) 202220229View paper
Life Sciences (XL) 2021202117View paper
Life Sciences (XL) 2020202017View paper
Life Sciences (XL) 2019201911View paper
Life Sciences (XL) 2018201815View paper
Life Sciences (XL) 2017201716View paper
Life Sciences (XL) 2016201613View paper
Life Sciences (XL) 201520154View paper
Life Sciences (XL) 2014201410View paper
Life Sciences (XL) 2013201311View paper
Life Sciences (XL) 2012201213View paper
Life Sciences (XL) 2011201113View paper
Life Sciences (XL) 2010201011View paper
Life Sciences (XL) 2009200915View paper
Life Sciences (XL) 2008200817View paper
Life Sciences (XL) 2007200716View paper

Sample previous year questions

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

1
2007 · Life Sciences · Biochemistry and Molecular Biology · Biomolecules and Molecular Information Flow
Life Sciences (XL) 2007
Deamination of cytosine produces
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2
2008 · Life Sciences · Biochemistry and Molecular Biology · Biomolecules and Molecular Information Flow
Life Sciences (XL) 2008
Identify W and X
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3
2009 · Life Sciences · Biochemistry and Molecular Biology · Biomolecules and Molecular Information Flow
Life Sciences (XL) 2009

Human DNA (3 × 106 Kb) is replicated in 5 hrs at a rate of 1 Kb/min. The number of origins of replication utilized are

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4
2010 · Life Sciences · Biochemistry and Molecular Biology · Biomolecules and Molecular Information Flow
Life Sciences (XL) 2010

A DNA-binding motif is

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5
2011 · Life Sciences · Biochemistry and Molecular Biology · Biomolecules and Molecular Information Flow
Life Sciences (XL) 2011
Which one of the following DOES NOT inhibit protein biosynthesis?
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6
2012 · Life Sciences · Biochemistry and Molecular Biology · Metabolism, Enzymes and Hormones
Life Sciences (XL) 2012
Which one of the following compounds does NOT block electron transport?
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