Vitamins Study questions

Question 1

Which AA is hwolly incorporated into purines?

Answer 1

glycine

Question 2

Which amino acid is a major precursor for gluconeogenesis?

Answer 2

alanine

Question 3

Which amino acid is a major donor of 1- carbons to THF?

Answer 3

serine (histidine, glycine, trypt)

Question 4

Which AA are components of glutathione?

Answer 4

cysteine, glycine, glutamate

Question 5

Which AA are BCAA?

Answer 5

leucine, valine, isoleucine

Question 6

Which AA is synthesized in a B12 mediated rxn?

Answer 6

methionine

Question 7

Which AA is a major fuel for enterocytes?

Answer 7

glutamine

Question 8

Which AA are nitrogen carriers in circulation?

Answer 8

Alanine, glutamine

Question 9

Which AA residues are hydroxylated in Vit C mediated processes?

Answer 9

proline, lysine (scurvy)

Question 10

Which AA is a precursor to serine?

Answer 10

tryptophan

Question 11

Which AA is a precursor to melanins?

Answer 11

tyrosine

Question 12

Which AA is a precursor to catecholamines?

Answer 12

tyrosine

Question 13

Which AA is a N donor in the urea cycle?

Answer 13

aspartate

Question 14

Which AA is wholly incorporated into pyrimidines?

Answer 14

aspartate

Question 15

Which AA are N donors in purine synthesis?

Answer 15

glycine, aspartate, glutamine

Question 16

Which AA are N donors in pyrimidine synthesis?

Answer 16

aspartate, glutamine

Question 17

Catabolism of which AA is impaired by phenylketonuria?

Answer 17

phenylalanine

Question 18

Which amino acids are precursors to carnitine?

Answer 18

lysine, methionine

Question 19

Which AA is a N donor in both purine and pyrimidine synthesis?

Answer 19

glutamine and aspartate

Question 20

Which AA is a precursor for niacin?

Answer 20

tryptophan

Question 21

Which AA are most important in buffering pH?

Answer 21

histidine and cysteine

Question 22

Which AA is a product of the urea cycle?

Answer 22

arginine

Question 23

Which AA can be de-aminated?

Answer 23

glutamine, glutamate, serine, threonine

Question 24

Which AA are purely ketogenic?

Answer 24

leucine, lysine

Question 25

Which AA provides NH3 to buffer H in the kidneys?

Answer 25

glutamine

Question 26

Which AA are targeted by Vit K?

Answer 26

glutamic acid

Question 27

Which AA is a component of SAM?

Answer 27

methionine

Question 28

WHen AA are transaminated, they are converted to :

Answer 28

a-keto acids

Question 29

What are the aromatic acids? are they ketogenic or glucogenic?

Answer 29

tryptophan, phenylalaine, tyrosine. They are both ketogenic and glucogenic

Question 30

AA are positive regulators of_____ release

Answer 30

glucagon and insulin

Question 31

The essential AAs are:

Answer 31

PVT TIM HALL: phenylalanine, valine, tryptophan, threonine, isoleucine, methionine, histidine, arginine, leucine, lysine

Question 32

Which AA is key fuel for the immune system?

Answer 32

glutamine

Question 33

____ is produced in significant amounts by gut bacteria

Answer 33

ammonia

Question 34

What AA is a part of THF?

Answer 34

glutamate

Question 35

Which AA can be synthesized from homocysteine?

Answer 35

cysteine and methionine

Question 36

Which AA is used in the conjugation of bile acids?

Answer 36

taurine and glycine

Question 37

Which AA are used in phase II reactions?

Answer 37

taurine and glycine

Question 38

Which AA can be converted to Propionyl CoA?

Answer 38

isoleucine, valine, threonine

Question 39

Which AA is incorporated into heme?

Answer 39

glycine

Question 40

ID an AA that is transaminated with pyruvate in skeletal muscle

Answer 40

BCAA- leucine, isoleucine, valine

Question 41

What enzyme assists in complete oxidation of some AA in muslce and gut?

Answer 41

malic enzyme

Question 42

Which AA consitute 50% of AA leaving muscle during fasting?

Answer 42

alanine, glutamine

Question 43

Which vitamin is most closely associated with Amino group metabolism?

Answer 43

B6

Question 44

Residues of which AA are linked to biotin?

Answer 44

lycine

Question 45

Which AA is extensively used in metallothioneins?

Answer 45

cysteine (S to chelate)

Question 46

Which AA can be depleted in heavy metal toxicity?

Answer 46

cysteine

Question 47

Which AA can be converted to GABA?

Answer 47

glutamate

Question 48

What is the major source of AA in the degradation of RBCs?

Answer 48

hemoglobin

Question 49

What AA catabolism is defective in maple syrup urine disease?

Answer 49

BCAA

Question 50

Ornithine is not an AA, so it is not included in the chart T/F

Answer 50

F- just not used to make proteins

Question 51

AA biosynthesis requires C source and ____source

Answer 51

N

Question 52

Which AA are spared by the liver follow dietary absorption?

Answer 52

BCAA

Question 53

Which AA is used to construct the ring in CoQ10?

Answer 53

phenylalanine and tyrosine

Question 54

If a persons diet is rich in alanine but poor in aspartate, will they show signs of deficiency?

Answer 54

NO- can make aspartate from alanine