IB Biology SL 8.3.2 Photosynthesis investigations Question Bank
Practise IB Biology SL 8.3.2 by interpreting indicator, pH and carbon-dioxide evidence from photosynthesis experiments.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Interpret indicator or pH changes as evidence of carbon-dioxide uptake during photosynthesis.
- Use experimental controls and observations to explain how light-driven photosynthesis changes solutions.
C1.3.2—CO₂ → glucose question 1
[Maximum number: 4]
Outline the production of carbohydrates in photosynthesis.
Light is absorbed by chlorophyll.
OR chlorophyll absorbs more red and blue light.
Absorbed light energy is converted to chemical energy.
Some of the energy is used for production of ATP.
Water molecules are split/photolysis.
Produces oxygen as waste product / hydrogen / NADPH.
Plants absorb/fix CO2 from air or water.
ATP/energy is needed to produce carbohydrates/starch.
[4 max]
Preserve all accept/do not accept/award/max/OWTTE guidance from the official markscheme.
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