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Enzyme
Test Description: Enzymes
Instructions: Answer all questions to get your test result.
1) The monomers of an enzyme are
A
proteins
B
amino acids
C
nucleic acids
D
lipids
2) All of these affect how fast an enzyme works EXCEPT
A
temperature
B
pH
C
the number of available substrates
D
light
3) What do enzymes do?
A
Slows down the chemical reaction by increasing the activation energy
B
Speed up chemical reactions by lowering the activation energy
C
Speed up chemical reactions by increasing the activation energy
D
Slows down the chemical reaction by lowering the activation energy
4) What is the analogy for speed bumps?
A
active site
B
activation energy
C
reactants
D
products
5) If an enzyme normally works at 10 degrees and the temperature rises to 90 degrees, what happens to that enzyme?
A
the enzyme changes shape and doesn't work anymore
B
the enzyme will work faster because pH is the only factor that affects how well an enzyme works
C
the enzyme works faster
D
the enzyme will continue to work at its normal rate because pH is the only factor that affects how well an enzyme works
6) Why might changing the temperature cause an enzyme to slow down and even stop the chemical reaction from occurring?
A
the temperature change will change the shape of the substrate
B
the temperature change will denature the enzyme
C
the temperature change will kill the enzyme
D
the temperature change causes substrates to move slowly
7) Which of the following is not a true statement about enzymes?
A
Changes in temperature and pH affect how well enzymes work
B
Enzymes are made up of amino acids
C
Enzymes can be reused
D
Once an enzyme is used for a chemical reaction, it will be destroyed.
8) Which group of organic molecules are enzymes an example of?
A
carbohydrates
B
lipids
C
nucleic acids
D
proteins
9) In the lock and key analogy, what term does the lock represent?
A
active site
B
substrate
C
enzyme
D
activation energy
10) In the lock and key analogy, what term does the substrate represent?
A
enzyme-substrate complex
B
product
C
activation energy
D
substrate
*select an answer for all questions
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