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Unit 2 Exam Review - Biological Molecules And Enzymes
Test Description: Unit 2 Exam Review
Instructions: Answer all questions to get your test result.
1) Which of the following is NOT a function of proteins?
A
store and transmit heredity
B
control the rate of reactions
C
to build tissues like bone and muscle
D
to help fight disease
2) Which of the following statements is true about enzymes?
A
All catalysts are enzymes
B
Enzymes lower the activation energy of a chemical reaction.
C
Enzymes slow down the rate of chemical reactions
D
Enzymes are used up during a chemical reaction
3) Enzymes affect the reactions in living cells by changing the
A
temperature of the reaction
B
products of the reaction
C
speed of the reaction
D
pH of the reaction
4) Hormones are used to communicate information among different parts of the body. To what class of organic compounds do hormones belong?
A
Lipids
B
Nucleic acids
C
Carbohydrates
D
Proteins
5) Glucose belongs to which category of organic compounds?
A
Nucleic acids
B
Carbohydrates
C
Lipids
D
Proteins
6) Which of the following are the building blocks of proteins?
A
Monosaccharides
B
Nucleotides
C
Amino acids
D
Nitrates
7) The energy needed to start a chemical reaction is called
A
activation energy
B
adhesion energy
C
cohesion energy
D
chemical energy
8) Both lipids and carbohydrates are important in animal cells because they
A
store energy
B
form cell walls
C
contain nitrogen
D
provide insulation
9) Antibodies are composed primarily of amino acids. In what class of organic compounds would antibodies belong?
A
proteins
B
nucleic acids
C
carbohydrates
D
lipids
10) What are the subunits of DNA and what are their functions?
A
Lipids for energy storage
B
Monosaccharides for quick energy
C
Proteins for building structural components
D
Nucleotides that store information
11) Which type of molecule do whales use for energy storage and insulation?
A
DNA
B
Glucose
C
Starch
D
Fat
12) Which most directly controls the rate at which food is broken down to release energy?
A
Nucleic acids
B
Enzymes
C
Hormones
D
Vitamins
13) Which type of organic compound are enzymes?
A
Nucleic acids
B
Carbohydrates
C
Proteins
D
Lipids
14) Which statement is true?
A
Amino acids are made of proteins.
B
RNA is made of nucleotides.
C
Simple sugars are made of polysaccharides.
D
Glycerol is made of fatty acids.
15) Where does the energy that enables you to breathe and think come from?
A
The games you play
B
The air you breathe
C
The food you eat
D
The water you drink
16) For this question refer to your study guide to see the graph. Which enzyme would you expect to find in a bacteria growing in a hot spring?
A
Both enzyme X and Y
B
Enzyme Y
C
Enzyme X
D
Neither enzyme X or Y
17) For this question refer to your study guide to see the graph. At what temperature do the two enzymes have the same amount of activity?
A
They never have the sae activity
B
45 degrees
C
40 degrees
D
50 degrees
18) For this question refer to your study guide to see the graph. What are the optimum (best) temperatures for each enzyme?
A
X=50-55 Y=75
B
X=40-42 Y=70
C
X=45-50 Y=80
D
X=40-42 Y=80
19) For this question refer to your study guide to see the graph. Which enzyme is active over the largest temperature range?
A
Enzyme X
B
Neither enzyme
C
Both enzymes
D
Enzyme Y
20) For this question refer to your study guide to see the graph. Which enzyme would have the most activity in humans?
A
Neither enzyme
B
Enzyme X
C
Enzyme Y
D
Both enzymes
*select an answer for all questions
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