Biochemical pathways, coenzymes, and inhibitors
Quiz
•
Biology
•
12th Grade
•
Hard

Courtney Swain-Edwards
Used 18+ times
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16 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following may occur when a molecule binds to a specific site on an enzyme (but not its active site) and this binding produces a change in the enzyme shape that affects and reduces its activity?
Competitive inhibition
Substrate concentration
Competitive regulation
Non-competitive inhibition
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The ATP produced by cellular respiration cannot be stored and, because it is unstable, any excess ATP loses its energy and is wasted. At times of high demand, the rate ATP production is stepped up and at times of lower demand, the rate is slowed. Which of the following is this an example of?
Denaturation
Regulation
Enzyme concentration
Non-competitive inhibition
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
As the temperature increases above the optimum, the reaction rate reduces sharply. This occurs because enzymes are proteins and when temperatures exceed the optimum, _____________ of the protein occurs.
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
When regulating biochemical pathways, the binding of _____________ to the allosteric site produces a change of shape in an enzyme that stops enzyme activity.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true?
1. As the temperature of an enzyme is decreased, the number of collisions between substrate and enzyme increases.
2. The optimal temperature is the temperature in which an enzyme has the greatest rate of activity.
3. Different enzymes may have a different optimal pH.
2 and 3
1 and 3
2 only
1 only
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
All enzyme molecules are saturated with substrate molecules when the maximum reaction rate of an enzyme is reached.
True
False
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Inhibitors always bind to the active site.
True
False
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