Vitamins as Coenzymes

Question 1

B1 Name

Answer 1

Thiamine

Question 2

B1 Active Form

Answer 2

Thiamine Pyrophosphate (TPP)

Question 3

Class of enzyme that B1 is a coenzyme for

Answer 3

Decarboxylase

Question 4

B1 notes

Answer 4

• Contains sulfur
• Kreb’s cycle

Question 5

B2 Name

Answer 5

Riboflavin

Question 6

B2 Active Form

Answer 6

FAD, FADH2, FMN

Question 7

Class of enzyme that B2 is a coenzyme for

Answer 7

Succinate dehydrogenase

Question 8

B2 notes

Answer 8

• Kreb’s cycle

Question 9

B3 Name

Answer 9

Niacin (niacinamide and nicotinic acid)

Question 10

B3 Active Form

Answer 10

NAD+ -> NADH + H+ (niacinamide)
NADPH + H+ -> NADP+ (nicotinic acid)

Question 11

Class of enzyme that B3 is a coenzyme for

Answer 11

Dehydrogenase (niacinamide)
Reductase (nicotinic acid)

Question 12

B3 notes

Answer 12

• Kreb’s cycle, most dehydrogenase
• Fat metabolism

Question 13

B5 Name

Answer 13

Pantothenic acid

Question 14

B5 Active Form

Answer 14

CoASH (Coenzyme A)

Question 15

Class of enzyme that B5 is a coenzyme for

Answer 15

Complexes that add CoASH

Question 16

B5 notes

Answer 16

Kreb’s cycle and other pathways

Question 17

B6 Name

Answer 17

Pyridoxine

Question 18

B6 Active Form

Answer 18

Pyridoxal 5 phosphate

Question 19

Class of enzyme that B6 is a coenzyme for

Answer 19

Transaminases AA metabolism

Question 20

B6 notes

Answer 20

Deficiency caused by birth control pills (as well as magnesium deficiency)

Question 21

B9 Name

Answer 21

Folic acid

Question 22

B9 Active Form

Answer 22

Tetrahydrofolate (THF) (H4Folate)

Question 23

Class of enzyme that B9 is a coenzyme for

Answer 23

Methyl transfer reactions

Question 24

B9 notes

Answer 24

Methylation cycle

Question 25

B12 Name

Answer 25

Cobalamin

Question 26

B12 Active Form

Answer 26

Methyl Cobalamin

Question 27

Class of enzyme that B12 is a coenzyme for

Answer 27

Methyl transfer reactions

Question 28

B12 notes

Answer 28

Methylation cycle

Question 29

B7 Name

Answer 29

Biotin

Question 30

B7 Active Form

Answer 30

Carboxybiotin

Question 31

Class of enzyme that B7 is a coenzyme for

Answer 31

Carboxylase

Question 32

B7 notes

Answer 32

Made by good bacteria in colon, but raw eggs contain avidin which binds biotin and makes it unavailable

Question 33

C Name

Answer 33

Ascorbic acid

Question 34

C Active Form

Answer 34

Reduced state

Question 35

Class of enzyme that C is a coenzyme for

Answer 35

• Hydroxylase Carnitine synthesis
• Keeps iron and iron and divalent cations in the +2 for for absorption
• Recycles Vitamin E