Enzymes — Flashcards

Flashcard 61: _____ is an obligate activator of pyruvate carboxylase

Answer: Acetyl-CoA

Flashcard 62: Catalase and GSH belong to the category of _____ antioxidants

Answer: preventive

Flashcard 63: _____ is present at higher levels in men than in women for alcohol metabolism

Answer: Gastric alcohol dehydrogenase (Enzyme)

Flashcard 64: Which trace element is a component of **ferroxidase** enzymes (e.g., ceruloplasmin, hephaestin)?

Answer: Copper

Extra: Ceruloplasmin (ferroxidase I) and hephaestin (ferroxidase II) are copper-containing enzymes. They oxidize ferrous iron (Fe²⁺) to ferric iron (Fe³⁺), which is a necessary step for iron to bind to transferrin after it is exported from cells via the transporter **ferroportin**.

Flashcard 65: Which compound inhibits enolase enzyme in the glycolysis pathway?_____

Answer: Fluoride

Flashcard 66: _____ converts active cortisol to inactive cortisone.

Answer: 11-beta-HSD2 (11-beta-hydroxysteroid dehydrogenase2)

Flashcard 67: Lathyrus odoratus/ Sweet pea causes lathyrism by inhibiting _____

Answer: Lysyl oxidase

Flashcard 68: Aromatase (CYP_____) converts testosterone to estradiol.

Answer: 19

Flashcard 69: Galactosyl transferase is a marker for _____

Answer: golgi apparatus (cell organelle)

Flashcard 70: Which ion is a part of enzyme dopamine hydroxylase?_____

Answer: Copper