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A-Level Biology · AQA · Paper 11 mark

Describe what is meant by semi-conservative replication

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Answer1 mark
  • A process in which each new DNA molecule is made up of one original (parent) strand and one newly synthesised strand
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A-Level Biology · AQA · Paper 24 marks

Name the four stages of aerobic respiration

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Answer4 marks
  • Glycolysis
  • The link reaction
  • The Krebs cycle
  • Oxidative phosphorylation
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A-Level Biology · AQA · Paper 12 marks

Describe the key difference between simple diffusion and facilitated diffusion

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Answer2 marks
  • In simple diffusion, molecules cross straight through the lipid part of the membrane itself
  • In facilitated diffusion, molecules cross at specific points via transmembrane channel or carrier proteins
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A-Level Biology · AQA · Paper 22 marks

Describe how a proton gradient is established during oxidative phosphorylation

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Answer2 marks
  • Electrons pass along a chain of carrier molecules, undergoing a series of oxidation-reduction reactions
  • The energy released is used to actively transport protons across the inner mitochondrial membrane into the intermembrane space
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A-Level Biology · AQA · Paper 12 marks

Compare the lock-and-key model of enzyme action with the induced-fit model

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Answer2 marks
  • Similarity: both models involve formation of an enzyme-substrate complex at the active site
  • Difference: in the induced-fit model the active site changes shape to fit the substrate, whereas in lock-and-key the active site is already a perfect fit
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A-Level Biology · AQA · Paper 22 marks

Describe the role of the myelin sheath, and explain why it insulates the axon

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Answer2 marks
  • A covering around the axon, formed from the membrane of Schwann cells
  • This membrane is rich in a lipid called myelin, which acts as an insulator, speeding up the rate of impulse transmission
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A-Level Biology · AQA · Paper 13 marks

Explain how ATP is used in active transport

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Answer3 marks
  • ATP is hydrolysed into ADP and inorganic phosphate
  • This reaction releases the energy needed to move solutes
  • The energy changes the shape of a carrier protein, allowing molecules to be moved against their concentration gradient
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A-Level Biology · AQA · Paper 24 marks

List four assumptions made when applying the Hardy-Weinberg equations

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Answer4 marks
  • No mutations are occurring
  • There is no selective advantage or disadvantage for any allele
  • The population is large
  • The population is isolated, with no migration in or out, and mating occurs randomly
A-LevelAQA

A-level Biology Flashcards (AQA)

£7.99
  • ⚡Instant download after checkout
  • 🎓Written by subject specialists
  • ✅Aligned with the AQA specification
  • 🗂️Includes an Anki file and a Quizlet class invite
What's inside

AQA A-Level Biology Flashcards

Digital flashcards covering the content assessed in AQA A-Level Biology. Choose Paper 1, Paper 2, or get both papers and save.

The cards use exam-style wording and question formats to build strong subject knowledge and help students become familiar with how AQA questions are structured.

Choose your option:

Paper 1: 900 flashcards (Units 1–10)
Paper 2: 1,200+ flashcards (Units 11–21)
Paper 1 & 2: 2,100+ flashcards covering all 21 units

What’s included:

Complete specification coverage for your chosen paper(s)

Exam-style questions and terminology

Clear answers for active recall

Compatible with Quizlet and Anki

Paper 1 topics:

UNIT 1: Biological molecules
UNIT 2: Nucleic acids
UNIT 3: Cells
UNIT 4: Transport across cell membranes
UNIT 5: Immunity
UNIT 6: Exchange
UNIT 7: Mass transport
UNIT 8: Protein synthesis
UNIT 9: Genetic diversity
UNIT 10: Biodiversity

Paper 2 topics:

UNIT 11: Photosynthesis
UNIT 12: Respiration
UNIT 13: Energy transfer and ecosystems
UNIT 14: Response to stimuli
UNIT 15: Coordination
UNIT 16: Homeostasis
UNIT 17: Inheritance
UNIT 18: Populations and evolution
UNIT 19: Populations and ecosystems
UNIT 20: Gene expression
UNIT 21: Gene technology

Format: Digital download
Exam board: AQA
Course: A-Level Biology
Assessment: Paper 1, Paper 2, or both

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