Biology: Chapter 8 – Flashcards
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Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
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Catabolism
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Which of the following is (are) true for anabolic pathways?
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They consume energy to build up polymers from monomers
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Which of the following is a statement of the first law of thermodynamics?
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Energy cannot be created or destroyed
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Why is ATP an important molecule in metabolism?
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It provides energy coupling between exergonic and endergonic reactions
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Which of the following is most similar in structure to ATP?
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an RNA nucleotide
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Which of the following statements is true concerning catabolic pathways?
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They supply energy, primarily in the form of ATP, for the cell's work.
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Which of the following statements regarding enzymes is true?
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Enzymes increase the rate of a reaction by lowering the activation energy barrier.
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The active site of an enzyme is the region that
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is involved in the catalytic reaction of the enzyme.
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According to the induced fit hypothesis of enzyme catalysis, which of the following is correct?
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The binding of the substrate changes the shape of the enzyme's active site.
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Which of the following is true of enzymes?
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Enzymes increase the rate of chemical reaction by lowering activation energy barriers.
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How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
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by changing the shape of the enzyme's active site
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Which of the following statements describes enzyme cooperativity?
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A substrate molecule bound to an active site of one subunit promotes substrate binding to the active site of other subunits.
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Allosteric enzyme regulation is usually associated with
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an enzyme with more than one subunit.
