BIOC 384 EXAM 3 ALL UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
Question:
1. CORRECT Answers
Answer:
, Question:
2. Module 7
Answer:
Start
Question:
3. Acetylcholinesterase is an important enzyme in the
nervous system. Acetylcholinesterase activity is blocked
by the nerve agent sarin gas, which forms a covalent
bond with a Ser in the active site of the enzyme. Sarin gas
is a(n)
irreversible inhibitor.
competitive inhibitor.
reversible inhibitor.
allosteric effector.
Answer:
irreversible inhibitor.
"forms a covalent bond with a Ser"
Question:
4. An inhibitor that binds only to the ES complex and not
free enzyme is known as a(n) ___________ inhibitor.
competitive
uncompetitive
irreversible
mixed
Answer:
uncompetitive
Question:
5. An enzyme undergoes a mutation that causes it to lose
the ability to be regulated via phosphorylation. Which of
the following mutations may lead to this loss of
regulation? Assume that the overall structure is not
altered by the mutation.
Tyr --> Phe
Thr --> Ser
Ser --> Tyr
Ser --> Thr
Answer:
Tyr --> Phe
AND CORRECT ANSWERS
Question:
1. CORRECT Answers
Answer:
, Question:
2. Module 7
Answer:
Start
Question:
3. Acetylcholinesterase is an important enzyme in the
nervous system. Acetylcholinesterase activity is blocked
by the nerve agent sarin gas, which forms a covalent
bond with a Ser in the active site of the enzyme. Sarin gas
is a(n)
irreversible inhibitor.
competitive inhibitor.
reversible inhibitor.
allosteric effector.
Answer:
irreversible inhibitor.
"forms a covalent bond with a Ser"
Question:
4. An inhibitor that binds only to the ES complex and not
free enzyme is known as a(n) ___________ inhibitor.
competitive
uncompetitive
irreversible
mixed
Answer:
uncompetitive
Question:
5. An enzyme undergoes a mutation that causes it to lose
the ability to be regulated via phosphorylation. Which of
the following mutations may lead to this loss of
regulation? Assume that the overall structure is not
altered by the mutation.
Tyr --> Phe
Thr --> Ser
Ser --> Tyr
Ser --> Thr
Answer:
Tyr --> Phe
