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Summary Enzymes Year 1 Biology A level AQA $4.52
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Summary Enzymes Year 1 Biology A level AQA

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  • Course
  • Unit 1 - Biological molecules
  • Institution
  • AQA

Notes from 1st year A level Biology. Achieved an A* in my final exams. Notes are based on the answers required for exam questions, based on the mark scheme requirements.

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  • November 2, 2024
  • 1
  • 2024/2025
  • Summary

Subjects

  • enzymes
  • biology
  • a level

Written for

  • A/AS Level
  • AQA
  • A Level Biology
  • Unit 1 - Biological molecules
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Enzymes summary notes
04 October 2022 14:46



Enzymes

- Biological catalysts
- Globular proteins
- Intracellular- produced and function inside the cell
- Extracellular- secreted by cell and catalyse reactions outside cells
- Break down substrates using hydrolysis


Function

- Have an active site where specific substrates bind forming enzyme substrate complex
- Active site has specific shape - complimentary
- Substrates collide with enzymes active site
- Shape of active site determined by tertiary structure

Reaction types

- Catabolic- breakdown of complex molecules into simpler products
- Anabolic - building of more complex molecules from simpler ones

How they work

- Lower activation energy of reaction (activation energy is the amount of energy required by substrate to carry out
reaction)
- Provide alternative energy pathway

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