One characteristic of enzyme competitive inhibition is that it results in an increase in the Km of the enzyme without a change in the Vmax. Why does competitive inhibition cause an increase in Km? OA. Because by binding to the active site the inhibitor increases the affinity of the enzyme for substrate. B. Because at low substrate concentration the inhibitor interferes with substrate binding to the enzyme. OC. Because the inhibitor binds to substrate molecules preventing them from accessing the enzyme active site. D. Because the inhibitor changes the shape of the active site preventing substate binding.

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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How should Saran respond?
A. YES! This is a great example of thermodynam
OB. YES! Since CO₂ will move rapidly from mitochondria to the chloroplast.
C. NO! To grow, the cell must fix more CO₂ than it releases through respiration.
OD. NO! Most plant cells do not photosynthesize and respire at the same time.
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Question 4 of 5
One characteristic of enzyme competitive inhibition is that it results in an increase in the Km of the enzyme without a change in the Vmax
Why does competitive inhibition cause an increase in Km?
A. Because by binding to the active site the inhibitor increases the affinity of the enzyme for substrate.
B. Because at low substrate concentration the inhibitor interferes with substrate binding to the enzyme.
C. Because the inhibitor binds to substrate molecules preventing them from accessing the enzyme active site.
D. Because the inhibitor changes the shape of the active site preventing substate binding.
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F2
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Question 5 of 5
Non-competitive(allosteric) regulation of enzymes is important in metabolism because it allows for the rapid adjustment of their activity.
Recall hexokinase, a key enzyme of glycolysis. Which of the following molecules likely functions as an allosteric inhibitor of its activity?
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Transcribed Image Text:How should Saran respond? A. YES! This is a great example of thermodynam OB. YES! Since CO₂ will move rapidly from mitochondria to the chloroplast. C. NO! To grow, the cell must fix more CO₂ than it releases through respiration. OD. NO! Most plant cells do not photosynthesize and respire at the same time. Reset Selection V Reset Selection Question 4 of 5 One characteristic of enzyme competitive inhibition is that it results in an increase in the Km of the enzyme without a change in the Vmax Why does competitive inhibition cause an increase in Km? A. Because by binding to the active site the inhibitor increases the affinity of the enzyme for substrate. B. Because at low substrate concentration the inhibitor interferes with substrate binding to the enzyme. C. Because the inhibitor binds to substrate molecules preventing them from accessing the enzyme active site. D. Because the inhibitor changes the shape of the active site preventing substate binding. 30³ F2 3 Question 5 of 5 Non-competitive(allosteric) regulation of enzymes is important in metabolism because it allows for the rapid adjustment of their activity. Recall hexokinase, a key enzyme of glycolysis. Which of the following molecules likely functions as an allosteric inhibitor of its activity? E D 20 F3 $ 4 R F4 LL. % 5 C F5 T G Time Remaining: 00:04:39 ▲ Hide Time Remaining 1 Points 6 1 Points J F6 Y & 7 H F7 U 00 * 8 J DII F8 8 F9 K O 7 F10 L > P F11
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