
Unit 2- Mod Retest
Authored by Christina Young
Science
9th Grade
NGSS covered

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20 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which of these will most likely happen if an enzyme is added to a certain chemical reaction? Select TWO correct answers.
The rate of reaction will decrease.
The reaction will completely stop.
The activation energy will be lowered.
The rate of reaction will start to increase.
Tags
NGSS.HS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
One way the enzyme and substrate interact using the model is that the enzyme binds to the substrate at a specific site.
The enzyme binds to the substrate at a specific site.
The enzyme changes the substrate into an enzyme.
The substrate breaks down the enzyme completely.
The enzyme and substrate do not interact at all.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The significance of the shape of the enzyme is that it:
determines the enzyme's specificity and function
allows the enzyme to be used for energy storage
makes the enzyme resistant to temperature changes
prevents the enzyme from binding to substrates
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to the graph, what is the best temperature range for the enzyme activity?
20°-30°
10°-20°
30°-40°
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student measured the time required for a carbohydrate sample to be completely digested in the presence of an enzyme under different pH levels. At which pH does the enzyme have the fastest reaction time?
6.8
6.9
7.1
Tags
NGSS.HS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Complete the statement below using the correct terms: activation energy, reaction, substrate, enzyme. A chemical reaction can be sped up when our bodies use a substance called a(n) _______. These help lower the _______ needed to start the _______.
enzyme, activation energy, reaction
substrate, reaction, enzyme
activation energy, substrate, enzyme
reaction, enzyme, substrate
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Environmental conditions can change the shape of the protein. What is the most likely result if the shape of the enzyme changes?
The substrate will change its shape to match the enzyme
The enzyme will no longer be able to catalyze the reaction with the substrate
The products made from the enzyme and the substrate will be changed
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