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Previous year question hub

Bioenergetics and Central Metabolic Pathways - Microbial Metabolism - Life Sciences Previous Year Questions

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

6Papers
6Years
6Questions
1Topics

Bioenergetics and Central Metabolic Pathways 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 5 83.3%
Hard 1 16.7%

Question type distribution

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

MCQ 6 100%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
6 Qs

Most asked topics

Top topics across the included previous year papers.

Microbial Metabolism
6 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Bioenergetics and Central Metabolic Pathways
6 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
1 Qs
Life Sciences (XL) 2023
1 Qs
Life Sciences (XL) 2021
1 Qs
Life Sciences (XL) 2017
1 Qs
Life Sciences (XL) 2009
1 Qs

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 documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20242024
1 questions in this view		2024
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ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20232023
1 questions in this view		2023
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20212021
1 questions in this view		2021
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Life Sciences (XL) 20172017
1 questions in this view		2017
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Life Sciences (XL) 20092009
1 questions in this view		2009
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download

All Bioenergetics and Central Metabolic Pathways previous year questions

Practice every matching question in batches of 20, with every available option.

1
2009 · Life Sciences · Microbial Metabolism · Bioenergetics and Central Metabolic Pathways
Life Sciences (XL) 2009
In which of the following bacterium, chemical energy is converted to both mechanical as well as light energy ?
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2
2017 · Life Sciences · Microbial Metabolism · Bioenergetics and Central Metabolic Pathways
Life Sciences (XL) 2017
Match the terms given in Group I with the descriptions from Group II.

Group I
(P) Photoautotrophs
(Q) Chemoautotrophs
(R) Photoheterotrophs
(S) Chemoheterotrophs

Group II
(I) Use inorganic chemical reactions for energy production
(II) Use organic compounds for energy production
(III) Use sunlight as energy source and carbon dioxide as carbon source
(IV) Use sunlight as energy source and organic compounds as carbon source
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3
2021 · Life Sciences · Microbial Metabolism · Bioenergetics and Central Metabolic Pathways
Life Sciences (XL) 2021
What is the number of ATPs generated per molecule of NADH during oxidative phosphorylation in E. coli via (i) NDH-1 and cytochrome bo complex or (ii) the NDH-2 and cytochrome bd complex? (Assume H+/ATP = 3)
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4
2023 · Life Sciences · Microbial Metabolism · Bioenergetics and Central Metabolic Pathways
Life Sciences (XL) 2023

The organisms that obtain energy from inorganic compounds are known as

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5
2024 · Life Sciences · Microbial Metabolism · Bioenergetics and Central Metabolic Pathways
Life Sciences (XL) 2024

Which one of the following use inorganic compounds as an energy source?

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6
2025 · Life Sciences · Microbial Metabolism · Bioenergetics and Central Metabolic Pathways
Life Sciences (XL) 2025
A bacterium obtains energy from a chemical source by the oxidation of reduced \(NO_2^-\) with \(CO_2\) as the principal carbon source. Which one of the following nutritional groups does this bacterium belong to?
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