Question

level 4 q1 which best explains how high temperatures affect enzymes and substrates? a. high temps. increase the substrate concentration and cause enzymes to be produced b. high temperatures unfold the substrate and allow enzymes to combine with them c. high temperatures denature enzymes and stop them from combining with substrates d. high temps. activate the enzymes and allow additional substrates to be attracted to them level 4 q3 a poison is bonded to the active site of an enzyme. which function is the enzyme most likely unable to perform because of the attachment of the poison molecule? a. the release of stored chemical energy b. the catalysis of the reaction with the substrate c. the supply of activation energy for a reaction d. the donation of electrons to the substrate

Explanation:

• For Q1: Enzymes are proteins. High temperatures break the weak bonds maintaining their structure, causing denaturation. Denatured enzymes can't bind to substrates. Option C correctly describes this.
• For Q3: The active - site of an enzyme is where the substrate binds for the catalytic reaction to occur. If a poison binds to the active - site, the enzyme cannot catalyze the reaction with the substrate. Option B is correct.

Answer:

Q1. C. High temperatures denature enzymes and stop them from combining with substrates
Q3. B. The catalysis of the reaction with the substrate