Biology
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Endothermic reaction | A reaction that requires energy input
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| Exothermic reaction | A reaction that gives off energy
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| Enzymes (4 Characteristics) | -Lower activation energy of a reaction.
-Increase the rate of the reaction.
-Do not affect the overall (delta)G or (delta)H of the reaction
-Are not changed or consumed in the course of the reaction
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| Apoenzymes | Enzymes without their cofactors
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| Holoenzymes | Enzymes that contain their cofactors
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| Allosteric Enzymes | An enzymes that has multiple binding sites. The active site is present, as well as at least one other site that can regulate the availability of the active site
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| Allosteric activators | An activator will result in a shift that makes the active site more available for binding to the substrate
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| Allosteric inhibitors | An inhibitor will result in a shift that makes the active site less available for binding to the substrate.
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| Feedback Inhibition | In feedback inhibition, the product may bind to an enzyme or enzymes that acted earlier in its biosynthetic pathway, thereby making the enzyme unavailable for other substrate to use.
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| Competitive Inhibition [How can it be overcome?] | An enzyme inhibitor that binds to the active site, thus competing with substrate.
[It can be overcome by adding more substrate]
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| Noncompetitive Inhibition [How is it overcome?] | An enzyme inhibitor that binds to an allosteric site instead of the active site, which induces a change in enzyme conformation.
[Cannot be overcome by adding more substrate. Can't be overcome at all]
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| Irreversible Inhibition | An enzyme inhibitor that binds to the active site and makes it permanently unavailable.
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| Zymogen/Proenzymes | An inactive enzyme precursor.
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Created by:
chri14
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