alleryStart learning →How does an allosteric effector change the behaviour of an enzyme?
AIt removes the enzyme from the cell
BIt cuts the enzyme into two halves
CIt alters the shape of the active site
DIt replaces the substrate completely
Answer & Solution
Correct answer: C. It alters the shape of the active site
1. An allosteric effector attaches to a site on the protein away from the active site.
2. It alters the steric structure of the enzyme, usually affecting the configuration of the active site.
3. That change raises or lowers the enzyme's affinity for its substrate.
4. Control relaxes once the effector concentration falls and it diffuses away from the protein.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.7 Regulation of Cellular Respiration_
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