
Enzyme Activity and Influencing Factors
Authored by Morgan Carter
Biology
9th Grade
NGSS covered

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following factors can affect enzyme activity?
Temperature
pH
Substrate concentration
All of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to an enzyme when the temperature is too high?
It becomes more active
It denatures
It becomes inactive but not denatured
It remains unchanged
Tags
NGSS.HS-LS1-7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does pH affect enzyme activity?
Enzymes are not affected by pH
Enzymes work best at a specific pH
Enzymes work better at high pH
Enzymes work better at low pH
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain why enzymes have an optimal temperature range.
Enzymes are proteins that can denature at high temperatures
Enzymes are lipids that dissolve at high temperatures
Enzymes are carbohydrates that crystallize at low temperatures
Enzymes are nucleic acids that mutate at high temperatures
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the effect of pH on enzyme activity using the concept of enzyme structure.
pH changes can alter the enzyme's active site
pH changes can increase enzyme concentration
pH changes can increase substrate concentration
pH changes have no effect on enzyme structure
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student observes that an enzyme-catalyzed reaction rate increases with temperature up to a point, then decreases. Explain this observation.
Enzymes become more active with heat, but too much heat denatures them
Enzymes are not affected by temperature
Enzymes dissolve at high temperatures
Enzymes are consumed in the reaction
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given an enzyme with an optimal pH of 7, predict the effect of a pH of 4 on its activity and explain why.
Activity will increase due to increased acidity
Activity will decrease due to denaturation
Activity will remain the same
Activity will increase due to increased substrate concentration
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