Biochemistry Review III: Metabolism

Question 1

This amino acid is used to make GABA and glutathione:

Answer 1

Glutamate

Question 2

This amino acid is used to make creatine, urea, and nitric oxide:

Answer 2

Arginine

Question 3

This amino acid is the precursor to heme:

Answer 3

Glycine

Question 4

This amino acid is the precursor to histamine:

Answer 4

Histidine

Question 5

This amino acid is used to make niacin, serotonin, and melanin:

Answer 5

Tryptophan

Question 6

This amino acid is used to make melatonin:

This amino acid is used to make melanin:

Answer 6

Phenylalanine is the precursor to melanin

Tryptophan is the precursor to melatonin

Question 7

This vitamin is used in the synthesis of dopamine, niacin, histamine, porphyrins, and GABA:

Answer 7

Vitamin B6

Question 8

Path by which phenylalanine is converted to epi:

Answer 8

Phenylalanine --phenylalanine OHase-->
Tyrosine --tyrosine OHase-->
Dopa --dopa decarboxylase-->
Dopamine --dopamine b-OHase-->
NE --phenylethanolamine N-methyltrans.ase-->
Epi

Question 9

Important products made from tryptophan (3):

Answer 9

Niacin

Serotonin, which is converted to melatonin

Question 10

Important product made from histidine:

Answer 10

Histamine

Question 11

Important product made from glycine:

Answer 11

Porphyrin

Question 12

Important products made from arginine (3):

Answer 12

Creatine
Urea
NO

Question 13

Important products made from glutamate (2):

Answer 13

GABA

Glutathione

Question 14

What are the breakdown products for the following:
Dopamine
NE
Epinephrine

Answer 14

Dopamine: HVA
NE: VMA
Epi: Metanephrines