A reversible noncompetitive inhibitor temporarily blocks an enzyme's active site. Enzymes don't denature as easily as smaller proteins when heated or stressed due to their complex secondary and tertiary structure. Oxidative phosphorylation is the biochemical process by which ATP is synthesized from ADP when protons cross the inner mitochondrial membrane.

A reversible noncompetitive inhibitor temporarily blocks an enzyme's active site. Enzymes don't denature as easily as smaller proteins when heated or stressed due to their complex secondary and tertiary structure. Oxidative phosphorylation is the biochemical process by which ATP is synthesized from ADP when protons cross the inner mitochondrial membrane.

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter3: Cells And How They Work

Section: Chapter Questions

Problem 7SQ: Which of the following statements is not true? Metabolic pathways _____. a. occur in a stepwise...

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Which of the following statements is not true? Metabolic pathways _____. a. occur in a stepwise series of chemical reactions b. are speeded up by enzymes c. may break down or assemble molecules d. always produce energy (such as ATP)
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When the enzyme hexokinase binds to glucose and ATP it undergoes a conformational change. All of the following are true about this enzyme-substrate binding EXCEPT: The active site changes shape so that it binds more tightly to the substrates The substrates are optimally positioned for the reaction to occur The substrates become contorted or strained, which increases their reactivity The activation energy of the reaction increases
The active site of an enzyme is usually a groove or pocket on the surface that A) binds allosteric regulators of the enzyme. B) is involved in the catalytic reaction of the enzyme. C) is inhibited by the presence of a coenzyme or a cofactor.
If you wanted to improve the catalytic efficiency of an enzyme, what changes might you make to the enzyme and why? Consider what factors affect catalysis. You can suggest a change in the environment or a change in the protein itself.
The synthesis of enzymes in response to changing metabolicneeds is referred to as _____________________.
Glycogen phosphorylase, an enzyme that catalyzes the breakdown of glycogen to form glucose, is active when a phosphate group is added. This is an example of enzyme regulation by ____________________________.
A metabolic pathway that functions in both anabolic andcatabolic processes is called an _____________________pathway.
Which is both an input and an output of a metabolic pathway? Acetyl-CoA Oxaloacetate Citrate GTP
When the final product of a series of enzymatically-catalyzed reactions binds to the first enzyme in the pathway to limit its production, it generally uses ___ because the structure of this final product is generally not similar to that of any of the enzyme's normal substrates. Zymogen activation Covalent modification Competitive inhibition Allosteric activation Allosteric inhibition
For a metabolic pathway that includes over thirty individual reactions, such as in glucose metabolism, the cell can control that pathway by controlling the synthesis or activation of a single enzyme. True False