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Previous year question hub

Plant Physiology and Biochemistry - Life Sciences Previous Year Questions

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

20Papers
20Years
87Questions
1Topics

Plant Physiology and Biochemistry question pattern

Every graph below is calculated only from this selection.

Questions by year

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

Difficulty distribution

How the classified questions are distributed by difficulty.

Medium 49 56.3%
Easy 36 41.4%
Hard 2 2.3%

Question type distribution

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

MCQ 77 88.5%
MSQ 9 10.3%
Numerical Answer Type (NAT) 1 1.1%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
87 Qs

Most asked topics

Top topics across the included previous year papers.

Plant Physiology and Biochemistry
87 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Photosynthesis, Respiration and Nitrogen Metabolism
42 Qs
Plant Biomolecules, Secondary Metabolites and Hormones
28 Qs
Water Relations and Mineral Transport
9 Qs
Stress Physiology and Senescence
8 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
4 Qs
Life Sciences (XL) 2024
4 Qs
Life Sciences (XL) 2023
6 Qs
Life Sciences (XL) 2022
2 Qs
Life Sciences (XL) 2021
5 Qs
Life Sciences (XL) 2020
2 Qs
Life Sciences (XL) 2019
7 Qs
Life Sciences (XL) 2018
5 Qs
Life Sciences (XL) 2017
6 Qs
Life Sciences (XL) 2016
8 Qs
Life Sciences (XL) 2015
4 Qs
Life Sciences (XL) 2014
3 Qs
Life Sciences (XL) 2013
4 Qs
Life Sciences (XL) 2012
5 Qs
Life Sciences (XL) 2011
5 Qs
Life Sciences (XL) 2010
6 Qs
Life Sciences (XL) 2009
1 Qs
Life Sciences (XL) 2008
2 Qs
Life Sciences (XL) 2007
3 Qs

Browse by subtopics

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

Photosynthesis, Respiration and Nitrogen Metabolism

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

42 questions19 papers19 years

Plant Biomolecules, Secondary Metabolites and Hormones

Explore previous-paper coverage, trends and focused practice for Plant Biomolecules, Secondary Metabolites and Hormones.

28 questions16 papers16 years

Water Relations and Mineral Transport

Explore previous-paper coverage, trends and focused practice for Water Relations and Mineral Transport.

9 questions5 papers5 years

Stress Physiology and Senescence

Explore previous-paper coverage, trends and focused practice for Stress Physiology and Senescence.

8 questions6 papers6 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) 202520254View paper
Life Sciences (XL) 202420244View paper
Life Sciences (XL) 202320236View paper
Life Sciences (XL) 202220222View paper
Life Sciences (XL) 202120215View paper
Life Sciences (XL) 202020202View paper
Life Sciences (XL) 201920197View paper
Life Sciences (XL) 201820185View paper
Life Sciences (XL) 201720176View paper
Life Sciences (XL) 201620168View paper
Life Sciences (XL) 201520154View paper
Life Sciences (XL) 201420143View paper
Life Sciences (XL) 201320134View paper
Life Sciences (XL) 201220125View paper
Life Sciences (XL) 201120115View paper
Life Sciences (XL) 201020106View paper
Life Sciences (XL) 200920091View paper
Life Sciences (XL) 200820082View paper
Life Sciences (XL) 200720073View paper

Sample previous year questions

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

1
2007 · Life Sciences · Plant Physiology and Biochemistry · Photosynthesis, Respiration and Nitrogen Metabolism
Life Sciences (XL) 2007
The gas Q is
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2
2008 · Life Sciences · Plant Physiology and Biochemistry · Photosynthesis, Respiration and Nitrogen Metabolism
Life Sciences (XL) 2008
C4 photosynthesis is a biochemical and structural syndrome that enhances
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3
2009 · Life Sciences · Plant Physiology and Biochemistry · Photosynthesis, Respiration and Nitrogen Metabolism
Life Sciences (XL) 2009
Identify the CORRECT statements :
P. Vernalization is the process where flowering is promoted by heat shock.
Q. The four different types of floral organs are initiated as separate whorls.
R. The flowering stimulus is transported to the meristem via the xylem.
S. Abscisic acid synthesis occurs via the carotenoid biosynthetic pathway.
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4
2010 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones
Life Sciences (XL) 2010
Which one of the following is NOT a plant hormone?
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5
2011 · Life Sciences · Plant Physiology and Biochemistry · Photosynthesis, Respiration and Nitrogen Metabolism
Life Sciences (XL) 2011
Which one of the following enzymes fixes CO₂ into organic form?
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6
2012 · Life Sciences · Plant Physiology and Biochemistry · Photosynthesis, Respiration and Nitrogen Metabolism
Life Sciences (XL) 2012
Leguminous plants maintain a very low concentration of free oxygen in their root nodules because
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