Which answer lists the steps of enzyme action in correct order?
A. Formation of enzyme-substrate complex, induced fit, formation or breakage of chemical bonds, release of product
B. Induced fit, formation of enzyme-substrate complex, formation or breakage of chemical bonds, release of product
C. Formation or breakage of chemical bonds, induced fit, formation of enzyme-substrate complex, release of substrate
D. Induced fit, formation or breakage of chemical bonds, formation of enzyme-substrate complex, release of product
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Question 2) Pancreatic amylase serves its function when it is located in the
A. mouth.
B. blood.
C. liver.
D. stomach.
E. small intestine.
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Question 3) Lactose intolerance is caused by the lack of the enzyme lactase, which is normally found in the
A. lumen of the stomach.
B. inside of cells of the liver and gall bladder.
C. membranes of cells in the small intestine.
D. inside of cells in the large intestine.
E. endothelium of capillaries in the large intestine.
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Question 4) The enzyme-substrate complex is
A. another name for the active site.
B. the reactants whose chemical reaction the enzyme catalyzes.
C. the chemical structure formed when the substrate binds to the active site.
D. a pocket on the substrate that the enzyme recognizes.
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Question 5) The region of an enzyme into which the substrate fits is a
A. one-size-fits-all active site.
B. highly specific active site.
C. highly specific antibody.
D. one-size-fits-all antibody.
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Question 6) Structurally, enzymes are generally
A. globular proteins.
B. fibrous proteins.
C. spherical carbohydrates.
D. elongated carbohydrates.
E. four-ring steroids.
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Question 7) Enzymes are biological catalysts that are crucial for normal human metabolism.
Indicate whether this statement is true or false.
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Question 8) Exergonic reactions do not require activation energy.
Indicate whether this statement is true or false.
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Question 9) In the absence of the enzyme carbonic anhydrase, the combination of water and carbon dioxide to form carbonic acid does not occur.
Indicate whether this statement is true or false.
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Question 10) The presence of an enzyme within a chemical system
A. increases activation energy.
B. decreases activation energy.
C. increases potential energy.
D. does not affect either activation energy or potential energy.
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