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 occurs mainly in the chloroplasts of plant cells, using sunlight, carbon dioxide, and water to produce glucose and oxygen.
Key Concepts
- 1Photosynthesis occurs in the chloroplasts of plant cells.
- 2The overall equation for photosynthesis is: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.
- 3Chlorophyll is the green pigment that captures light energy.
- 4Photosynthesis consists of two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle).
- 5Photosynthesis is essential for life on Earth as it produces oxygen and organic compounds.
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, which is a type of sugar. Oxygen is released as a byproduct. This process is vital because it provides energy for plants and oxygen for us to breathe.
Memory Trick
“Remember 'Cows Make Great Oats' to recall the key components: Carbon dioxide, Water, Glucose, and Oxygen.”
Flashcards
What is the main pigment involved in photosynthesis?
Tap to reveal answer
Exam Questions
Describe and explain the process of photosynthesis. [6 marks]
6 marksView mark scheme hint▾
Include the overall equation, the role of chlorophyll, and the two stages of photosynthesis.
Explain how light intensity affects the rate of photosynthesis. [4 marks]
4 marksView mark scheme hint▾
Discuss the relationship between light intensity and the rate of photosynthesis, including limiting factors.
What is meant by the term 'chlorophyll'? [2 marks]
2 marksView mark scheme hint▾
Define chlorophyll and explain its role in photosynthesis.
Practice Quiz
What is the primary purpose of photosynthesis?
Need custom study material?
Paste your own notes into StudyMate AI and instantly generate summaries, flashcards and quizzes tailored to your content.