Unit 2 Exam Review - Biological Molecules And Enzymes Question Preview (ID: 32264)


Unit 2 Exam Review. TEACHERS: click here for quick copy question ID numbers.

Which of the following is NOT a function of proteins?
a) to build tissues like bone and muscle
b) to help fight disease
c) control the rate of reactions
d) store and transmit heredity

Which of the following statements is true about enzymes?
a) Enzymes lower the activation energy of a chemical reaction.
b) All catalysts are enzymes
c) Enzymes slow down the rate of chemical reactions
d) Enzymes are used up during a chemical reaction

Enzymes affect the reactions in living cells by changing the
a) pH of the reaction
b) speed of the reaction
c) temperature of the reaction
d) products of the reaction

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

Glucose belongs to which category of organic compounds?
a) Lipids
b) Nucleic acids
c) Proteins
d) Carbohydrates

Which of the following are the building blocks of proteins?
a) Nitrates
b) Nucleotides
c) Amino acids
d) Monosaccharides

The energy needed to start a chemical reaction is called
a) chemical energy
b) cohesion energy
c) activation energy
d) adhesion energy

Both lipids and carbohydrates are important in animal cells because they
a) provide insulation
b) contain nitrogen
c) form cell walls
d) store energy

Antibodies are composed primarily of amino acids. In what class of organic compounds would antibodies belong?
a) nucleic acids
b) proteins
c) carbohydrates
d) lipids

What are the subunits of DNA and what are their functions?
a) Monosaccharides for quick energy
b) Nucleotides that store information
c) Proteins for building structural components
d) Lipids for energy storage

Which type of molecule do whales use for energy storage and insulation?
a) DNA
b) Starch
c) Fat
d) Glucose

Which most directly controls the rate at which food is broken down to release energy?
a) Hormones
b) Enzymes
c) Nucleic acids
d) Vitamins

Which type of organic compound are enzymes?
a) Lipids
b) Nucleic acids
c) Proteins
d) Carbohydrates

Which statement is true?
a) Simple sugars are made of polysaccharides.
b) RNA is made of nucleotides.
c) Glycerol is made of fatty acids.
d) Amino acids are made of proteins.

Where does the energy that enables you to breathe and think come from?
a) The air you breathe
b) The water you drink
c) The food you eat
d) The games you play

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) Enzyme X
b) Enzyme Y
c) Both enzyme X and Y
d) Neither enzyme X or Y

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) 40 degrees
b) 45 degrees
c) 50 degrees
d) They never have the sae activity

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

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) Enzyme Y
c) Both enzymes
d) Neither enzyme

For this question refer to your study guide to see the graph. Which enzyme would have the most activity in humans?
a) Enzyme X
b) Enzyme Y
c) Both enzymes
d) Neither enzyme

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