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Chemical Reactions And Enzymes
Test Description: Chemical reactions in the body (2.4)
Instructions: Answer all questions to get your test result.
1) Identify the reactant(s) shown here: CO2 + H2O → H2CO3.
A
CO2
B
H2O + H2CO3
C
CO2 + H2O
D
H2CO3
2) The energy needed to get a reaction started is the ___.
A
cohesion energy
B
activation energy
C
chemical energy
D
adhesion energy
3) Which of the following statements is true about catalysts?
A
Catalysts are used up during a chemical reaction
B
Catalysts lower the activation energy of a chemical reaction
C
Catalysts slow down the rate of chemical reactions
D
All catalysts are enzymes
4) The elements or compounds that go into a chemical reaction are ____.
A
isotopes
B
products
C
catalysts
D
reactants
5) Which of the following statements about enzymes is NOT true?
A
Enzymes work best at a specified pH
B
The shape of an enzyme allows it to work with a particular substrate
C
Enzymes are proteins
D
The place where a substrate connects with an enzyme is called the substrate site
6) Which of the following is LEAST likely to affect the rate of enzyme activity?
A
regulatory molecules
B
pH
C
temperature
D
amount of the substrate
7) Chemical reactions cannot occur without a catalyst.
A
true
B
false
8) Chemical reactions that absorb energy MUST have a source of energy to occur
A
true
B
false
9) Catalase (found in liver cells) is an enzyme that breaks down H2O2
A
true
B
false
10) The elements or compounds that are created as a result of a chemical reaction are called ____
A
activation energy
B
reactants
C
products
D
enzymes
*select an answer for all questions
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