A) The reaction has probably stopped because the amount of saliva is small and you would have to add more saliva to continue the degradation.
B) The reaction will continue indefinitely since the enzyme is not consumed by the reaction.
C) The reaction will continue until half is digested and then stop because the reaction between substrate and product will be balanced.
D) The reaction has probably stopped because the yogurt has denatured the enzyme.
E) As long as the enzyme is not denatured by environmental conditions,the reaction will continue until all of the substrate is used up.
G) A) and D)
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B) False
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A) Energy cannot be changed from one form to another without a loss of usable energy.
B) One usable form of energy can be completely converted into another usable form.
C) Energy cannot be created nor destroyed but it can be changed from one form to another.
D) Energy cannot be created or destroyed.
E) Energy cannot be transformed.
G) A) and B)
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B) False
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A) the adenine base.
B) the adenine and the ribose.
C) the ribose sugar.
D) the adenine and the phosphates.
E) the phosphate groups.
G) A) and C)
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A) reduction
B) oxidation
C) phosphorylation
D) metabolism
E) an enzyme-substrate complex
G) A) and E)
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A) The amount of disorder in the universe is always increasing.
B) To maintain organization of a cell,a continual input of energy is required.
C) Living cells without energy would become less organized.
D) While the total amount of energy in a system is unchanged,energy lost as heat is no longer useful to the cell in doing work.
E) Carbon dioxide and water form glucose without the input of energy.
G) None of the above
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A) thought cannot be linked to cell processes because energy is not related to matter.
B) since thoughts can occur over and over,the requirement for a continual input of energy to prevent entropy does not apply to this cell activity.
C) the cellular energy expended in thinking must be less than the chemical bond energy supplied in food to these brain cells.
D) "thinking" is beyond the scope of science to study.
E) "thinking" is not a cellular process and therefore does not require energy.
G) B) and C)
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A) increase the energy of activation.
B) decrease the productivity of the cell.
C) always require coenzymes.
D) have active sites complementary in shape to their substrates.
E) are named for their substrate.
G) B) and E)
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D
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A) Kinetic energy is energy of motion.
B) Water stored behind a dam is an example of kinetic energy.
C) Energy in the chemical bonds of a molecule is kinetic energy.
D) Potential energy must be used immediately or it is lost.
E) Light energy is a form of chemical energy.
G) C) and D)
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B) False
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B) False
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False
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A) if the gene for the enzyme has been turned on and the enzyme made.
B) if the enzyme has been activated or inactivated by the addition of a phosphate group.
C) whether an inhibitor is bound to the enzyme.
D) whether the necessary cofactor is present.
E) whether the enzyme catalyzes an endergonic or exergonic reaction.
G) B) and D)
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B) False
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B) False
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A) Energy of activation is measured as the energy that is released after a reaction occurs.
B) Adding the correct enzyme can lower the energy of activation.
C) In any one metabolic pathway,all steps will have the same energy of activation.
D) Energy of activation is the difference between the energy of the reactant and the energy of the product.
E) The energy of activation is always lower than the energy of the reactant.
G) All of the above
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A) involve the same substrates and therefore the same enzymes.
B) are exactly the same.
C) involve oxidation reactions during photosynthesis and reduction reactions during respiration.
D) involve oxidation reactions during respiration and reduction reactions during photosynthesis.
E) both involve oxidation and reduction reactions.
G) A) and D)
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A) A is the substrate and C is the product.
B) C is the substrate and A is the product.
C) It is impossible to tell with this information.
D) Both A and C are the products.
E) Both A and C are the substrates.
G) A) and C)
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B
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A) increase the temperature moderately.
B) increase the concentration of the enzyme.
C) increase the amount of substrate.
D) change to optimum pH for the reaction.
E) decrease the temperature.
G) B) and D)
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B) False
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