1.Which coenzyme is composed of a 2-mercaptoethylamine unit, the vitamin pantoth
ID: 539635 • Letter: 1
Question
1.Which coenzyme is composed of a 2-mercaptoethylamine unit, the vitamin pantothenate and an ADP moiety?
options:
a) biotin
b)ubiquinone
c) coenzyme A
d)NADPH
e) ATP
2. NAD+ and NADP+ dependent dehydrogenases oxidize substrates by transferring ________ to C-4 of the nicotinamide group NAD+and NADP+.
options:
one electron and one proton
two electrons and one proton
two electrons and two protons
two electrons
NAD+ and NADP+do not play a cofactor role in oxidation-reduction reactions.
a)one electron and one proton
b)two electrons and one proton
c)two electrons and two protons
d)two electrons
e)NAD+ and NADP+do not play a cofactor role in oxidation-reduction reactions.
Explanation / Answer
1] Which coenzyme is composed of a 2-mercaptoethylamine unit, the vitamin pantothenate and an ADP moiety?
Coenzyme A
Answer is c
2] NAD+ and NADP+ dependent dehydrogenases oxidize substrates by transferring ________ to C-4 of the nicotinamide group NAD+and NADP+.
2 electrons and one proton
Answer is b
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