Notes for C1.3.2 Conversion of carbon dioxide to glucose in photosynthesis - IB | RevisionDojo
C1.3.2 Conversion of carbon dioxide to glucose in photosynthesis Notes
Photosynthesis Uses Hydrogen from Water to Convert CO₂ into Glucose
In this section you need to be able to write the simple word equation for photosynthesis, where glucose is the product.
Note
HL students: To understand how carbon dioxide is converted to glucose, head to articles C1.3.11 to C1.3.19
Word Equation for Photosynthesis
The word equation for photosynthesis is as follows:
Carbon Dioxide+Water+Light Energy ⟶ Glucose+Oxygen
Carbon Dioxide (CO₂): Absorbed from the atmosphere through the stomata in the leaves.
Water (H₂O): Absorbed from the soil by the plant's roots.
Light Energy: Captured by the chlorophyll in the chloroplasts and used to drive the reaction.
Glucose (C₆H₁₂O₆): The product, which serves as the chemical energy source for the plant.
Oxygen (O₂): Released as a byproduct into the atmosphere.
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Questions
Recap questions
1 of 5
Question 1
Recap question
Why cannot a plant produce glucose when water is withheld, even if light intensity and CO2 concentration remain high?
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Lesson
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Note
Photosynthesis is the process by which plants, algae, and certain bacteria convert carbon dioxide (CO₂) from the atmosphere and water (H₂O) from the soil into glucose (C₆H₁₂O₆), a simple sugar that stores chemical energy. This process also produces oxygen (O₂) as a byproduct. The hydrogen required to form glucose comes from splitting water molecules during the light-dependent reactions of photosynthesis.
