Biochemistry- Nutritional Chemistry Flashcards Preview

NPLEX I > Biochemistry- Nutritional Chemistry > Flashcards

Flashcards in Biochemistry- Nutritional Chemistry Deck (60)
1

Vitamin B1 is known as what?

Thiamin

2

Vitamin B2 is known as what?

Riboflavin

3

Vitamin B3 is known as what?

Niacin/ nicotinic acid

4

Vitamin B5 is known as what?

Pantothenic acid

5

Vitamin B6 is known as what?

Pyridoxine

6

Vitamin B12 is known as what?

Cobalamin

7

What is the active form of B1/thiamin called?

Thiamin pyrophosphate

8

Vitamin B1 requires what mineral?

magnesium

9

Transketolase in the hexose shunt requires what vitamin?

Thiamin/ B1

10

Oxidative carboxylation in the pyruvate dehydrogenase complex needs what vitamin?

B1/ thiamin

11

Where is B1 absorbed?

jejunum

12

FAD and FMN are active constituents of what vitamin?

B2- Riboflavin

13

Where is riboflavin absorbed?

Duodenum/Jejunum

14

What vitamins are used in oxidation-reduction reactions/ electron transfer reactions (dehydrogenase enzymes)

B3 and B2 (niacin and riboflavin)

15

What form of niacin is used in synthesis pathways?

NADPH

16

NAD and NADH are the oxidized and reduced forms of what vitamin?

B3/Niacin

17

What amino acid can form niacin?

Tryptophan

18

What is the active form of pantothenic acid/B5?

Coenzyme A

19

Where is B5/Pantothenic acid absorbed?

Intestinal mucosa/ brush border

20

Which vitamin is essential for reactions using CoA?

B5

21

Pyridoxal phosphate is the active form of what vitamin?

B6/ pyridoxine

22

What mineral is needed to activate B6?

magnesium

23

What vitamin plays a role in transamination reactions?

B6

24

Which vitamin is essential for nucleotide synthesis and for single carbon transfers?

Folic Acid

25

What vitamin serves as CO2 carrier in carboxylation reactions?

Biotin

26

What vitamin is needed as a cofactor to activate folic acid?

Cobalamin/ B12

27

What is the first active form of B12?

Methylcobolamine

28

List some of the biochemical activities of Vitamin C

reducing agent
cofactor for hydroxylation reactions eg. proline, dopamine and NE/Epi synthesis
carnitine synthesis,
Enhances Iron mobilization, Bile acid formation
influence on cholesterol metabolism

29

What is the active form of Vitamin A in the blood?

Retinol

30

What i the active form of Vitamin A in the eyes?

Retinal

31

What is the active form of Vitamin A in epithelial cells?

Retinoic acid

32

Beta carotene is a precursor to what vitamin?

Vitamin A

33

What is the storage form of Vitamin A in the liver?

Retinyl palmitate

34

Where is vitamin A absorbed?

Lumen of SI

35

Which of the active forms of Vitamin D increases serum calcium?

1, 25 di(OH)D

36

Which of the active forms of Vitamin D lowers serum calcium?

24, 25 di(OH)D

37

Where are the inactive metabolites of vitamin D converted into an active form?

kidney

38

Which hormone plays a role in activating Vitamin D?

PTH

39

Where is Vitamin E stored?

adipose tissue (fat soluble)

40

What converts 7-hydroxycholesterol into cholecalciferol?

sunlight on the skin

41

What vitamin is required for the biosynthesis of clotting factors?

Vitamin K

42

Which vitamin is a cofactor in post synthetic modification of proteins via carboxylation reaction, which allows for the chelation of Calcium?

Vitamin K

43

What is the active form of Vitamin K?

Hydroxyquinone

44

Which mineral is important for energy producing reactions?

Phosphorous

45

The production of osteocalcin is dependent on what vitamin?

Vitamin K

46

What mineral is important for clotting?

Calcium

47

This mineral, once it is attached to a substance, traps it inside a cell

Phosphorous

48

All the reactions using ATP use this mineral as a cofactor

Magnesium

49

This mineral is a constituent of DNA and RNA

Phosphorous

50

The mineral activates a number of B Vitamins

magnesium

51

Which mineral is the most abundant intracellularly?

Potassium

52

What mineral is in cytochromes?

Iron

53

Which mineral is an insulin co-factor?

Chromium

54

Which mineral is a part of glutathione peroxidase?

selenium

55

Which mineral is a part of Vitamin B12?

cobalt

56

Which mineral is needed for cholesterol synthesis?

Manganese

57

What is in blood transport of iron?

Transferrin

58

What is the main storage of iron?

Ferritin

59

What stores excess iron?

Hemosiderin

60

What substance is protective in that it keeps iron away from bacteria?

Lactoferrin