12 Jun Jefferson MICRO 227 – Enzymes are important to metabolic
Question
QUESTION 1
Enzymes are important to metabolic reactions of the cell in which of the following ways?
Enymes allow reactions that could not normally occur.
Enzymes lower the activation energy needed for the reaction.
Enzymes increase the rate (speed) of reaction so that the reaction occurs more quickly.
Both A and B are correct
Both B and C are correct.
1 points
QUESTION 2
What is the correct term for the area on the enzyme which binds to and interacts with the substrate?
Substrate binding site
Active site
Allosteric site
Cofactor
Amino acid bridge
1 points
QUESTION 3
What is the expected result of the substrate binding to the enzyme?
Metabolic pathway proceeds
Metabolic pathway stops and can not restart
Metabolic pathway stops but can resume when inhibition is removed
Substrate binding to the enzyme has no effect on cell function.
1 points
QUESTION 4
Where, on the enzyme, will a competitive inhibitor bind?
Active site
Allosteric site
Both of these simultaneously
Both of these at different times
Neither A nor B
1 points
QUESTION 5
What is the expected result when a competitive inhibitor binds to the enzyme?
Metabolic pathway proceeds
Metabolic pathway stops and can not restart
Metabolic pathway stops but can resume when the inhibition is removed.
The competitive inhibitor binding to the enzyme has no effect on cell function.
1 points
QUESTION 6
In microbial cells, the endproduct of a metabolic pathway may bind to one of the first couple of enzymes in the pathway. What is the correct name of this process?
Noncompetitve inhibition
Competitive Inhibition
Feedback inhibition
Answers 1 and 3 are correct.
Answers 1 and 2 are correct.
All answers are correct.
1 points
QUESTION 7
In microbial cells, the endproduct of a metabolic pathway may bind to one of the first couple of enzymes in the pathway. What is the correct term for the area on the enzyme where this binding occurs?
Active site
Allosteric site
Substrate binding site
Amino acid bridge
None of these
1 points
QUESTION 8
What is the expected result when the endproduct of a metabolic pathway binds to an enzyme in that pathway?
Metabolic pathway proceeds
Metabolic pathway stops and cannot restart
Metabolic pathway stops but can resume when the inhibition is removed.
The binding of the endproduct to the enzyme has no effect on cell function.
1 points
QUESTION 9
Most enzymes are active at one particular temp. What result on enzyme function would you expect if a bacteria culture was placed at a temperature BELOW its “best” temperature?
No effect on enzyme activity
Enzyme activity would slow but continue
Enzyme activity would quickly stop
Enzyme activity would increase
1 points
QUESTION 10
Most enzymes are active at one particular temp. What result on enzyme
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