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Photosynthesis and Respiration — Syllabus

ICSE · Class 7 · Biology

What Photosynthesis and Respiration covers in ICSE Class 7 Biology: 4 topics, for the 2026-27 session. Part of the ICSE Class 7 Biology syllabus.

43 questions36 flashcards6 formulas & key relations5 concepts

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An infographic or comparison chart highlighting the key differences between aerobic and anaerobic respiration, including oxygen requirement, location, products, and ATP yield.
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4 Topics · ICSE Class 7 Biology · 2026-27

Topics in Photosynthesis and Respiration

1

Photosynthesis

  • Green plants are autotrophs because they prepare their own food.
  • Photosynthesis is the process by which green plants capture solar energy and use it to convert carbon dioxide and water into simple sugars.
  • Photosynthesis requires water, carbon dioxide, chlorophyll and energy from sunlight.
2

Factors Affecting Photosynthesis

  • The three most important factors affecting photosynthesis are carbon dioxide, light and suitable temperature.
  • These three factors are interdependent and each limits the others.
  • If carbon dioxide is low, photosynthesis becomes slow even if light and temperature are suitable.
3

Experiments Showing Photosynthesis

  • A variegated leaf such as Coleus has white or yellow patches that lack chlorophyll.
  • In the starch test, only the green parts of a variegated leaf turn blue-black.
  • This shows that photosynthesis occurs only in chlorophyll-containing parts.
4

Respiration

  • Respiration is the process in which glucose is broken down to release energy.
  • A large part of the energy released is converted into ATP.
  • Some energy is also released as heat.

Key Concepts

Central concept: Photosynthesis and Respiration in Plants

PhotosynthesisRespirationLeaf structure and gas exchangeTransport in plantsFactors affecting photosynthesisExperiments on photosynthesisTypes of respirationComparison of photosynthesis and respiration

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Frequently Asked Questions

What are the important topics in Photosynthesis and Respiration for ICSE Class 7 Biology?
Key topics in Photosynthesis and Respiration include Photosynthesis, Factors Affecting Photosynthesis, Experiments Showing Photosynthesis, Respiration. Study these first, then practise questions on each for Class 7 exams.
How should I revise Photosynthesis and Respiration for Class 7 exams?
Learn the core ideas first, then work through the 43 practice questions on Photosynthesis and Respiration. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 7 Biology Syllabus

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