Metabolic Pathways
Integrated enzyme-controlled pathways, anabolic and catabolic reactions, membranes, induced fit and pathway inhibition.
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
Distinguish anabolic energy-requiring synthesis from catabolic energy-releasing breakdown.
Exam cue: Distinguish anabolic energy-requiring synthesis from catabolic energy-releasing breakdown.
Concept 2
Relate active-site induced fit, activation energy and substrate or product concentration to reaction rate.
Exam cue: Relate active-site induced fit, activation energy and substrate or product concentration to reaction rate.
Concept 3
Compare competitive, non-competitive and feedback inhibition in pathway control.
Exam cue: Compare competitive, non-competitive and feedback inhibition in pathway control.
Risk pitfalls and guardrails
Enzymes lower activation energy; they do not change the reaction’s overall energy difference.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
A non-competitive inhibitor does not need to occupy the active site.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
Memory anchors
Metabolism
Catabolic cuts; anabolic assembles.
Feedback inhibition
A late product slows an earlier controlling enzyme.
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 is a metabolic pathway?
Which description identifies an anabolic reaction?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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