Enzymes — Flashcards

_____ may be converted to norepinephrine via the enzyme dopamine beta-hydroxylase (with vitamin C as a cofactor)

_____ activates factor XII, which initiates the intrinsic pathway of the coagulation cascade

Activation energy of an enzyme is free energy difference between the _____ & transition State.

Acetaldehyde may be converted to _____ via the enzyme acetaldehyde dehydrogenase

Pepsinogen (inactive) is converted into _____ (active) in the presence of H+

Leydig cells do not contain the steroid hormone enzymes _____ or 11-hydroxylase and, therefore, cannot synthesize glucocorticoids or mineralocorticoids

In cells containing mineralocorticoid receptors, _____ may be converted to cortisone by the enzyme 11-hydroxysteroid dehydrogenase

In the _____ cells of the ovary, testosterone is converted to 17-estradiol via the enzyme aromatase

The rate of a reaction depends on the concentration of both the _____ and the substrate

Dopamine in the CNS may be degraded to _____ via the enzyme MAO-B