CCEA AS Biology 1.2 (Enzymes) – Study Guide & Practice Questions
What are enzymes? - correct answer ✔✔Globular proteins that act as catalysts inside living
organisms
What does a catalyst do? - correct answer ✔✔Alters the rate of a chemical reaction without
undergoing permanent changes itself
What is activation energy? - correct answer ✔✔The minimum amount of energy needed to
start a reaction
What is an exothermic reaction? - correct answer ✔✔One in which heat is given out
What do enzymes do to activation energy? - correct answer ✔✔They reduce it
What is the structure of an enzyme? - correct answer ✔✔- Proteins with a tertiary structure
What is the active site? - correct answer ✔✔The region of an enzyme where the substrate fits
What are enzyme break down reactions known as? - correct answer ✔✔Catabolic reactions
What are enzyme build up reactions known as? - correct answer ✔✔Anabolic reactions
What are the two models of enzyme action? - correct answer ✔✔- The lock and key model
- The induced fit model
What are enzymes? - correct answer ✔✔Globular proteins that act as catalysts inside living
organisms
What does a catalyst do? - correct answer ✔✔Alters the rate of a chemical reaction without
undergoing permanent changes itself
What is activation energy? - correct answer ✔✔The minimum amount of energy needed to
start a reaction
What is an exothermic reaction? - correct answer ✔✔One in which heat is given out
What do enzymes do to activation energy? - correct answer ✔✔They reduce it
What is the structure of an enzyme? - correct answer ✔✔- Proteins with a tertiary structure
What is the active site? - correct answer ✔✔The region of an enzyme where the substrate fits
What are enzyme break down reactions known as? - correct answer ✔✔Catabolic reactions
What are enzyme build up reactions known as? - correct answer ✔✔Anabolic reactions
What are the two models of enzyme action? - correct answer ✔✔- The lock and key model
- The induced fit model
