AQA Biology Enzymes Revision Notes
Master AQA Biology Enzymes using simple revision notes, key facts and practice questions — all generated by AI for your exam.
Enzymes are biological catalysts that speed up chemical reactions in living organisms by lowering the activation energy required. They are crucial for various metabolic processes and are highly specific to their substrates.
Key Concepts
- 1Enzymes are proteins that catalyze biochemical reactions.
- 2Each enzyme has an active site specific to its substrate.
- 3Enzymes lower the activation energy of reactions.
- 4Factors affecting enzyme activity include temperature, pH, and substrate concentration.
- 5Enzymes can be denatured by extreme conditions, losing their function.
Simple Explanation
Enzymes are special proteins that help speed up chemical reactions in our bodies. They work by fitting perfectly with specific molecules called substrates, making it easier for reactions to happen. If the temperature or acidity changes too much, enzymes can stop working properly.
Memory Trick
“Remember 'EASE' for enzymes: Enzymes Are Specific and Efficient.”
Flashcards
What is the role of an enzyme?
Tap to reveal answer
Exam Questions
Describe and explain the effect of temperature on enzyme activity. [6 marks]
6 marksView mark scheme hint▾
Discuss the increase in activity with temperature, the optimum temperature, and denaturation at high temperatures.
Explain how pH affects enzyme activity. [4 marks]
4 marksView mark scheme hint▾
Mention the effect of pH on enzyme structure and activity, including denaturation.
What is meant by enzyme denaturation? [2 marks]
2 marksView mark scheme hint▾
Define denaturation and explain its impact on enzyme function.
Practice Quiz
What is the primary function of enzymes?
Need custom study material?
Paste your own notes into StudyMate AI and instantly generate summaries, flashcards and quizzes tailored to your content.