Xenobiotic Metabolizing Enzyme Reactions Quiz
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Questions and Answers

Which drug is metabolized through N-dealkylation?

  • Caffeine (correct)
  • Barbiturates
  • Ibuprofen
  • Amphetamines

Which drug undergoes amine oxidation in its metabolism?

  • Ethanol
  • Chloral hydrate
  • Clonazepam
  • Epinephrine (correct)

Which of the following drugs is metabolized by S-oxidation?

  • Nicotine
  • Acetaminophen
  • Chlorpromazine (correct)
  • Thioridazine

Which type of reaction is involved in the metabolism of aspirin?

<p>Hydrolysis (C)</p> Signup and view all the answers

In humans, which process significantly induces P450-mediated drug metabolism?

<p>Amphetamine oxidation (A)</p> Signup and view all the answers

What is the main function of Cytochrome P450s in xenobiotic metabolism?

<p>Oxidation and dealkylation (A)</p> Signup and view all the answers

Which enzyme is responsible for the addition of glucuronic acid in Phase II reactions of xenobiotic metabolism?

<p>UDP-glucuronosyltransferases (B)</p> Signup and view all the answers

What is the main purpose of Glutathione-S-transferases (GST) in drug metabolism?

<p>Addition of glutathione (D)</p> Signup and view all the answers

Which enzyme is NOT involved in Phase I reactions of xenobiotic metabolism?

<p>Sulfotransferases (SULT) (B)</p> Signup and view all the answers

What is the primary function of Alcohol Dehydrogenase in xenobiotic metabolism?

<p>Reduction of alcohols (A)</p> Signup and view all the answers

Which enzyme category is responsible for the addition of methyl groups to xenobiotics?

<p>Methyltransferases (C)</p> Signup and view all the answers

What is the main purpose of Phase II metabolism in xenobiotics?

<p>Convert xenobiotics to more polar hydroxylated derivatives (B)</p> Signup and view all the answers

Which drug metabolism reaction involves the conjugation with glutathione?

<p>Glutathione conjugation (A)</p> Signup and view all the answers

In alcohol metabolism, what system is responsible for increased activity in chronic alcoholism?

<p>Microsomal ethanol oxidizing system (MEOS) (A)</p> Signup and view all the answers

Which type of drug metabolism reaction involves the addition of a sulfate group?

<p>Sulfation (D)</p> Signup and view all the answers

What happens to xenobiotics during Phase II metabolism?

<p>They become more water-soluble and polar (A)</p> Signup and view all the answers

Which reaction type involves conjugating drugs with glucuronic acid in Phase II metabolism?

<p>Glucuronidation (B)</p> Signup and view all the answers

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