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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
lipids
D
nucleic acids
2) All of these affect how fast an enzyme works EXCEPT
A
temperature
B
pH
C
light
D
the number of available substrates
3) What do enzymes do?
A
Speed up chemical reactions by increasing the activation energy
B
Slows down the chemical reaction by increasing the activation energy
C
Slows down the chemical reaction by lowering the activation energy
D
Speed up chemical reactions by lowering the activation energy
4) What is the analogy for speed bumps?
A
activation energy
B
active site
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 will continue to work at its normal rate because pH is the only factor that affects how well an enzyme works
B
the enzyme will work faster because pH is the only factor that affects how well an enzyme works
C
the enzyme changes shape and doesn't work anymore
D
the enzyme works faster
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 denature the enzyme
B
the temperature change causes substrates to move slowly
C
the temperature change will kill the enzyme
D
the temperature change will change the shape of the substrate
7) Which of the following is not a true statement about enzymes?
A
Enzymes can be reused
B
Once an enzyme is used for a chemical reaction, it will be destroyed.
C
Changes in temperature and pH affect how well enzymes work
D
Enzymes are made up of amino acids
8) Which group of organic molecules are enzymes an example of?
A
proteins
B
lipids
C
carbohydrates
D
nucleic acids
9) In the lock and key analogy, what term does the lock represent?
A
active site
B
enzyme
C
activation energy
D
substrate
10) In the lock and key analogy, what term does the substrate represent?
A
product
B
enzyme-substrate complex
C
substrate
D
activation energy
*select an answer for all questions
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