Enzymes
16 review questions with answers for Enzymes. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Region of an enzyme where the substrate binds?
- Allosteric site
- Receptor
- Active siteRight answer
- Carrier protein
What this set covers
Enzyme structure and behavior are the theme: the active site, substrate, enzyme-substrate complex, lock and key versus induced fit, activation energy, specificity, temperature and pH effects, denaturation, and amylase, protease and lipase.
- Common mix-up
- Students often mix up a slow enzyme in the cold and a denatured enzyme: cold molecules just have less kinetic energy, but high temperature permanently changes the shape of the active site.
- Review tip
- Sketch a rate against temperature graph and annotate the cold, optimum and denatured regions in words, then do the same for pH using pepsin as the example.
All 16 questions and answers
Region of an enzyme where the substrate binds?
Answer: Active site
Molecule that an enzyme acts on?
Answer: Substrate
Model in which the substrate fits a rigid active site exactly?
Answer: Lock and key
Model in which the active site changes shape slightly as the substrate binds?
Answer: Induced fit
Enzymes speed up reactions by lowering the…?
Answer: Activation energy
Temporary structure formed when the reactant molecule fits into the active site?
Answer: Enzyme–substrate complex
Property meaning each enzyme catalyses only one type of reaction?
Answer: Specificity
Permanent change to the shape of the active site caused by high temperature?
Answer: Denaturation
Optimum temperature of most human enzymes?
Answer: 37 °C
Enzymes work slowly in the cold because molecules have less…?
Answer: Kinetic energy
Approximate optimum pH of pepsin in the stomach?
Answer: pH 2
When all active sites are occupied, raising the substrate concentration makes the rate…?
Answer: Stay the same
State of an enzyme molecule after it has catalysed a reaction?
Answer: Unchanged
Enzyme that breaks down starch into maltose?
Answer: Amylase
Proteases break proteins down into…?
Answer: Amino acids
Lipases break lipids down into…?
Answer: Fatty acids and glycerol
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.