When multiple enzymes are organized in a metabolic pathway, each enzyme catalyzes one reaction and then releases the product.
Indicate whether this statement is true or false.
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Question 2) Allosteric inhibitors are also called noncompetitive inhibitors.
Indicate whether this statement is true or false.
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Question 3) Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the
A. allosteric site, and its effectiveness is not influenced by substrate concentration.
B. allosteric site, and its effectiveness depends on substrate concentration.
C. active site, and its effectiveness is not influenced by substrate concentration.
D. active site, and its effectiveness depends on substrate concentration.
E. substrate, and its effectiveness depends on product concentration.
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Question 4) A substance that binds to the active site of an enzyme and turns it off is called a _________ inhibitor.
Fill in the blank with correct word.
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Question 5) A large decrease in pH results in increased H+ binding to an enzyme, which can disrupt electrostatic interactions within the molecule.
Indicate whether this statement is true or false.
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Question 6) The less acidic (more basic) the environment is, the more efficient an enzyme will be.
Indicate whether this statement is true or false.
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Question 7) The optimal pH range for the stomach enzyme pepsin is
A. 2-4.
B. 6-8.
C. 7.3-7.4.
D. 10-12.
E. 12.0-13.5.
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Question 8) A fever of 101 F causes most enzymes in the human body
A. to denature.
B. to become more rigid.
C. to be more flexible and efficient.
D. to saturate.
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Question 9) he optimal pH range for most human enzymes is
A. 1-2.
B. 4-6.
C. 6-8.
D. 8-10.
E. 13-14.
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Question 10) Cold temperatures (below 36 C) denature proteins, which is why biochemistry labs never freeze enzymes.
Indicate whether this statement is true or false.
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