Enzyme Question Preview (ID: 43016)
Enzymes.
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The monomers of an enzyme are
a) amino acids
b) proteins
c) nucleic acids
d) lipids
All of these affect how fast an enzyme works EXCEPT
a) light
b) pH
c) temperature
d) the number of available substrates
What do enzymes do?
a) Speed up chemical reactions by increasing the activation energy
b) Speed up chemical reactions by lowering the activation energy
c) Slows down the chemical reaction by lowering the activation energy
d) Slows down the chemical reaction by increasing the activation energy
What is the analogy for speed bumps?
a) products
b) reactants
c) activation energy
d) active site
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 works faster
c) the enzyme changes shape and doesn't work anymore
d) the enzyme will work faster because pH is the only factor that affects how well an enzyme works
Why might changing the temperature cause an enzyme to slow down and even stop the chemical reaction from occurring?
a) the temperature change causes substrates to move slowly
b) the temperature change will change the shape of the substrate
c) the temperature change will kill the enzyme
d) the temperature change will denature the enzyme
Which of the following is not a true statement about enzymes?
a) Enzymes can be reused
b) Changes in temperature and pH affect how well enzymes work
c) Once an enzyme is used for a chemical reaction, it will be destroyed.
d) Enzymes are made up of amino acids
Which group of organic molecules are enzymes an example of?
a) proteins
b) lipids
c) carbohydrates
d) nucleic acids
In the lock and key analogy, what term does the lock represent?
a) enzyme
b) activation energy
c) substrate
d) active site
In the lock and key analogy, what term does the substrate represent?
a) enzyme-substrate complex
b) activation energy
c) product
d) substrate
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