GCSEBiology

GCSE Biology Photosynthesis Revision Notes

Master GCSE Biology Photosynthesis using simple revision notes, key facts and practice questions — all generated by AI for your exam.

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy. This process uses carbon dioxide and water to produce glucose and oxygen, which are essential for life on Earth.

Key Concepts

  • 1Photosynthesis occurs in the chloroplasts of plant cells.
  • 2The overall equation for photosynthesis is: carbon dioxide + water + light energy → glucose + oxygen.
  • 3Chlorophyll is the green pigment that captures light energy.
  • 4Photosynthesis can be divided into two stages: the light-dependent reactions and the light-independent reactions (Calvin cycle).
  • 5Factors affecting the rate of photosynthesis include light intensity, carbon dioxide concentration, and temperature.

Simple Explanation

Photosynthesis is how plants make their food using sunlight. They take in carbon dioxide from the air and water from the soil, and with the help of a green pigment called chlorophyll, they convert these into glucose (a type of sugar) and oxygen. This process not only feeds the plants but also produces oxygen, which is vital for us to breathe.

Memory Trick

“Remember 'COWS' for Photosynthesis: Carbon dioxide, Oxygen, Water, Sunlight.”

Flashcards

Question1 / 5

What is the main pigment involved in photosynthesis?

Tap to reveal answer

Exam Questions

Describe and explain the process of photosynthesis. [6 marks]

6 marks
View mark scheme hint▾

Include the location, reactants, products, and stages of photosynthesis.

Explain how light intensity affects the rate of photosynthesis. [4 marks]

4 marks
View mark scheme hint▾

Discuss the relationship between light intensity and photosynthesis rate, including limiting factors.

What is meant by the term 'chlorophyll'? [2 marks]

2 marks
View mark scheme hint▾

Define chlorophyll and its role in photosynthesis.

Practice Quiz

Question 1 of 5Score: 0

What is the primary function of photosynthesis?

Need custom study material?

Paste your own notes into StudyMate AI and instantly generate summaries, flashcards and quizzes tailored to your content.

Study Your Own Notes