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Photosynthesis

ICSE · Class 10 · Biology

Step-by-step guide to study Photosynthesis in ICSE Class 10 Biology. Topics to cover, practice strategy, and time allocation.

44 questions22 flashcards5 concepts

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A labeled diagram of a dicot stomatal apparatus, showing the bean-shaped guard cells, the stomatal pore, and the surrounding subsidiary cells and epidermal cells.
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. There are 44 questions available for this chapter.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit Photosynthesis after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.

What to Focus On

  • Photosynthesis = light energy + CO₂ + H₂O → glucose + O₂ + H₂O
  • It is an anabolic (building up) process
  • Chlorophyll is essential — it absorbs light energy

  • Palisade cells: elongated, tightly packed, most chloroplasts, near upper surface
  • Spongy cells: irregularly shaped, air spaces between them, fewer chloroplasts
  • Upper epidermis: transparent, waxy cuticle, no stomata

  • Chloroplast: biconvex disc, 4–10 μm diameter, 2–3 μm thick
  • Double membrane surrounds each chloroplast
  • Stroma: fluid-filled matrix, site of dark reaction

Common Mistakes to Avoid

Plants get their food from soil through roots, just like animals eat food

Plants only carry out photosynthesis, not respiration

Oxygen released during photosynthesis comes from the splitting of CO2

Memory Tips

Photosynthesis equation: 6CO₂ + 12H₂O → C₆H₁₂O₆ + 6H₂O + 6O₂

Photosynthesis is an anabolic process — building complex molecules from simple ones

Chloroplast structure: Grana (for light reaction) and Stroma (for dark reaction)

Photosynthetic pigments: Chlorophyll a, Chlorophyll b, Carotenes, Xanthophylls

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Frequently Asked Questions

What are the important topics in Photosynthesis for ICSE Class 10 Biology?
Key topics in Photosynthesis include Mechanism of Photosynthesis: Light and Dark Reactions, Mechanism of Photosynthesis: Light and Dark Reactions, Light Reaction vs Dark Reaction — What Happens Where. These are the concepts ICSE Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Photosynthesis — ICSE Class 10 Biology?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and 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.

More resources for Photosynthesis

All 16 chapters — ICSE Class 10 Biology Study Plan

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