Ethylene glycol is a chemical used to prevent water from freezing. If ethylene glycol is swallowed accidentally, it is metabolised by an enzyme found in liver cells to produce a toxic product.
The enzyme normally catalyses the oxidation of ethanol to a harmless product.
People who have swallowed ethylene glycol are treated with large doses of ethanol. This prevents formation of a toxic product and allows the body to excrete the ethylene glycol.
Which statement describes why this treatment works?
1 )
Ethanol binds near the active site on the enzyme, altering its shape.
2 )
Ethanol binds permanently to the active site of the enzyme, blocking it.
3 )
Ethanol changes the tertiary structure of the enzyme, denaturing it.
Ethanol is more likely to bind to the active site on the enzyme.
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