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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
H2O + H2CO3
B
CO2
C
H2CO3
D
CO2 + H2O
2) The energy needed to get a reaction started is the ___.
A
chemical energy
B
activation energy
C
cohesion energy
D
adhesion energy
3) Which of the following statements is true about catalysts?
A
Catalysts are used up during a chemical reaction
B
All catalysts are enzymes
C
Catalysts slow down the rate of chemical reactions
D
Catalysts lower the activation energy of a chemical reaction
4) The elements or compounds that go into a chemical reaction are ____.
A
reactants
B
isotopes
C
products
D
catalysts
5) Which of the following statements about enzymes is NOT true?
A
The place where a substrate connects with an enzyme is called the substrate site
B
Enzymes work best at a specified pH
C
Enzymes are proteins
D
The shape of an enzyme allows it to work with a particular substrate
6) Which of the following is LEAST likely to affect the rate of enzyme activity?
A
temperature
B
regulatory molecules
C
pH
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
false
B
true
9) Catalase (found in liver cells) is an enzyme that breaks down H2O2
A
false
B
true
10) The elements or compounds that are created as a result of a chemical reaction are called ____
A
products
B
reactants
C
activation energy
D
enzymes
*select an answer for all questions
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