Food Supply, Plant Growth and Productivity
Food security, sustainable production, trophic losses, photosynthetic pigments, electron transport, photolysis and the Calvin cycle.
How to study Higher Biology
Move from accurate biological mechanisms to unfamiliar data, experimental evidence and justified conclusions. Use current official materials for the written, extended-response and controlled-assignment formats that this question bank does not reproduce.
Core concepts
Concept 1
Evaluate food production against land, resource, trophic-efficiency and sustainability constraints.
Exam cue: Evaluate food production against land, resource, trophic-efficiency and sustainability constraints.
Concept 2
Trace light energy through pigments, electron transport, ATP generation, photolysis and NADPH.
Exam cue: Trace light energy through pigments, electron transport, ATP generation, photolysis and NADPH.
Concept 3
Explain carbon fixation by RuBisCO and the use of ATP and NADPH to form G3P, regenerate RuBP and make carbohydrates.
Exam cue: Explain carbon fixation by RuBisCO and the use of ATP and NADPH to form G3P, regenerate RuBP and make carbohydrates.
Risk pitfalls and guardrails
Oxygen released in photosynthesis comes from water, not carbon dioxide.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
The Calvin cycle uses ATP and NADPH; it does not directly require light photons.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
Memory anchors
Light reactions
Light drives ATP, NADPH and oxygen formation.
Calvin cycle
Fix CO₂, reduce to G3P, regenerate RuBP.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What does food security mean?
Which practice is most consistent with sustainable food production?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
What is Pass Harbor?
Completely free exam prep for 247 UK exams.
- Practice questions
- Flashcards
- Study guides
- Mock exams
- No registration
- No paywall
- Start instantly
“No more expensive exam prep. Quality study tools should be accessible to everyone.”