Q1
What is the overall photosynthesis equation?
A6CO2+6H2O+light→C6H12O6+6O2
B6O2+6H2O→C6H12O6
CCO2+H2O→O2 only
DNo fixed equation exists
ICSEClass 10 (ICSE)BiologyCh 6 · Topic 2
Practice and Revision - Photosynthesis
Let us practise and revise what we learned about photosynthesis. Photosynthesis is the process by which green plants convert light energy in
Core concept
The overall photosynthesis equation is: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2, occurring mainly in chloroplasts containing chlorophyll.
How it works
The light reaction occurs in the thylakoid membranes, capturing light energy and splitting water to release oxygen and produce ATP and NADPH.
Why it matters
The dark reaction (Calvin cycle) occurs in the stroma, using ATP and NADPH from the light reaction to convert carbon dioxide into glucose.
Key detail
Factors affecting the rate of photosynthesis include light intensity, carbon dioxide concentration, and temperature, each acting as a potential limiting factor.
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• Equation: 6CO2+6H2O+light → C6H12O6+6O2.
• Occurs in chloroplasts, containing chlorophyll.
• Light reaction: in thylakoid membranes.
• It splits water, releases O2, makes ATP/NADPH.
• Dark reaction (Calvin cycle): in the stroma.
• It uses ATP/NADPH to make glucose from CO2.
• Factors: light, CO2, temperature.
• Each can be a limiting factor.