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Previous year question hub

Microbial Metabolism - Life Sciences Previous Year Questions

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

11Papers
11Years
27Questions
1Topics

Microbial Metabolism 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 16 59.3%
Medium 9 33.3%
Hard 2 7.4%

Question type distribution

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

MCQ 25 92.6%
MSQ 2 7.4%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
27 Qs

Most asked topics

Top topics across the included previous year papers.

Microbial Metabolism
27 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Fermentation, Respiration and Photosynthesis
18 Qs
Bioenergetics and Central Metabolic Pathways
6 Qs
Biosynthesis and Metabolic Regulation
3 Qs

Paper coverage

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

Life Sciences (XL) 2025
1 Qs
Life Sciences (XL) 2024
2 Qs
Life Sciences (XL) 2023
4 Qs
Life Sciences (XL) 2021
4 Qs
Life Sciences (XL) 2020
2 Qs
Life Sciences (XL) 2017
3 Qs
Life Sciences (XL) 2013
4 Qs
Life Sciences (XL) 2012
2 Qs
Life Sciences (XL) 2010
1 Qs
Life Sciences (XL) 2009
2 Qs
Life Sciences (XL) 2008
2 Qs

Browse by subtopics

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

Fermentation, Respiration and Photosynthesis

Explore previous-paper coverage, trends and focused practice for Fermentation, Respiration and Photosynthesis.

18 questions10 papers10 years

Bioenergetics and Central Metabolic Pathways

Explore previous-paper coverage, trends and focused practice for Bioenergetics and Central Metabolic Pathways.

6 questions6 papers6 years

Biosynthesis and Metabolic Regulation

Explore previous-paper coverage, trends and focused practice for Biosynthesis and Metabolic Regulation.

3 questions3 papers3 years

Included previous year papers

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

Paper nameYearPDFAttempt
Life Sciences (XL) 20252025
1 questions in this view		2025
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20242024
2 questions in this view		2024
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20232023
4 questions in this view		2023
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Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20212021
4 questions in this view		2021
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Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20202020
2 questions in this view		2020
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20172017
3 questions in this view		2017
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Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20132013
4 questions in this view		2013
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20122012
2 questions in this view		2012
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20102010
1 questions in this view		2010
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20092009
2 questions in this view		2009
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Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20082008
2 questions in this view		2008
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Official documents
Official question paperOriginal authority-issued PDF Official Download

Sample previous year questions

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

1
2008 · Life Sciences · Microbial Metabolism · Fermentation, Respiration and Photosynthesis
Life Sciences (XL) 2008
Match the products in group 1 with their producer organisms given in group 2. Group 1 (P) Ethanol (Q) L-Lysine (R) Biopesticide (S) Vancomycin Group 2 1. Streptomyces orientalis 2. Saccharomyces cerevisiae 3. Corynebacterium glutamicum 4. Bacillus thuringiensis
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2
2009 · Life Sciences · Microbial Metabolism · Fermentation, Respiration and Photosynthesis
Life Sciences (XL) 2009
A wild type strain of E. coli growing on a mixture of glucose and acetate shows a typical biphasic diauxic growth. A mutant strain was isolated and was found not to exhibit the second phase of diauxic growth. This mutant is likely to be defective in
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3
2010 · Life Sciences · Microbial Metabolism · Fermentation, Respiration and Photosynthesis
Life Sciences (XL) 2010
Match the microorganism in Group I with the application in Group II
Group I
P. Aspergillus oryzae
Q. Brevibacterium flavum
R. Thiobacillus ferrooxidans
S. Saccharomyces cerevisiae
T. Rhizobium meliloti
Group II
1. Metal ore leaching
2. Glucoamylase producer
3. Bread making
4. Glutamic acid producer
5. Penicillin producer
6. Symbiotic nitrogen fixer
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4
2012 · Life Sciences · Microbial Metabolism · Fermentation, Respiration and Photosynthesis
Life Sciences (XL) 2012
Which ONE of the following components is NOT an electron acceptor during anaerobic respiration?
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5
2013 · Life Sciences · Microbial Metabolism · Fermentation, Respiration and Photosynthesis
Life Sciences (XL) 2013
Which one of the following DO NOT use water as an electron source during photosynthesis?
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6
2017 · Life Sciences · Microbial Metabolism · Fermentation, Respiration and Photosynthesis
Life Sciences (XL) 2017
Which one of the following is the end product of dissimilatory sulfate reduction by sulfate reducing bacteria?
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