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Enzymes
Test Description: Enzymes questions
Instructions: Answer all questions to get your test result.
1) Why are enzymes specific?
A
Are lipids with special functions
B
They only work at one temperature
C
They only work at one pH
D
They only bind to certain substrates
2) All enzymes are
A
Proteins
B
Carbohydrates
C
Nucleic acids
D
Lipids
3) The name of the compound that binds to an enzyme
A
Chemical
B
Product
C
Substrate
D
Protein
4) Activation energy is the
A
Energy needed to end a chemical reaction.
B
The energy of the enzyme-substrate complex.
C
Energy needed to get a chemical reaction started.
D
The area where a substrate binds to the enzyme.
5) Enzymes and catalysts speed up the rate of chemical reactions by:
A
Decreasing the activation energy.
B
Increasing the heat produced.
C
Decreasing the heat produced.
D
Increasing the activation energy.
6) Individuals who lack lactase are unable to break down the sugar lactose. Which term best describes lactase
A
Fat
B
Enzyme
C
Carbohydrate
D
Lipid
7) What best describes an acid?
A
a pH below 7
B
a pH = 7
C
none of these
D
a pH above 7
8) What best describes a base?
A
a pH below 7
B
none of these
C
a pH above 7
D
a pH = 7
9) Why are enzymes reusable?
A
They are renewed by other enzymes.
B
Enzymes are not changed when they catalyze a chemical reaction.
C
Enzymes are constantly regenerated by respiration
D
Enzymes are made of strong materials
10) Proteins are made of
A
Monosaccharides
B
Nucleotides
C
Amino acids
D
Fatty Acids
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