Page 1 of 51
NBCE PART 1- BIOCHEMISTRY LATEST 2025 COMPLETE
EXAM| ACTUAL EXAM QUESTIONS WITH CORRECT
VERIFIED ANSWERS/ ALREADY GRADED A+
Coenzymes are formed where? .....ANSWER..... In the intestinal
mucosa
Coenzymes are formed from what vitamin? .....ANSWER..... B
vitamins
What are the different types of B vitamins? .....ANSWER..... B1:
Thiamin, B2: Riboflavin, B3: Niacin, B5: Panthotenic Acid, B6:
Pyridoxine, B7: Biotin, B9: Folic Acid, B12: Cyanocobalamine,
These Ribs Need PaPys B*tchin Food Cyanide
The active coenzyme created from thiamine (B1) is?
.....ANSWER..... Thiamine pyrophosphate
Thiamine pyrophosphate has what function? .....ANSWER.....
Decarboxylation.
,Page 2 of 51
In order to convert pyruvic acid to acetyl CoA, we need?
.....ANSWER..... Thiamine pyrophosphate
Beri-Beri is a deficiency in? .....ANSWER..... Thiamine. Causes
numbness in fingers and toes. (Rub berrys on thighs)
Wernicke-korsakoffs is seen in who? .....ANSWER..... Alcoholics,
from a deficiency in thiamine
What B-Vitamin contains sulfur? .....ANSWER..... B1: Thiamine, B5:
Pantothenic acid.
The isoallaxazine ring system (Flavin Ring) is seen in what B-
vitamin? .....ANSWER..... Riboflavin
What are the active coenzymes for riboflavin? .....ANSWER.....
FMN and FAD
Riboflavin is involved in? .....ANSWER..... Dehydrogenase
enzymes:
,Page 3 of 51
What happens with hydrogen amounts during
oxidation/reduction? .....ANSWER..... OIL RIG (Oxidation LOSE
hydrogen) Reduction (GAIN hydrogen)
Succinate uses what to turn into Fumarate? .....ANSWER.....
Succinate dehydrogenase
FAD, from riboflavin, will gain 2Hs, turning it into FADH2 during
what phase of the krebs cycle? .....ANSWER..... When succinate
turns into fumarate. (S-F-F)
The two Hs gained from FAD turning into FADH2 can be brought
to the electron transport chain and cashed in for how many ATP?
.....ANSWER..... 2 ATPs!!
Deficiency in riboflavin leads to? .....ANSWER..... Cheilosis
(Severe cracking of lips) Yellow urine
Niacin can be taken in from what amino acid? .....ANSWER.....
Tryptophan (Trip on a Fan at Night)
, Page 4 of 51
Niacins active coenzymes are .....ANSWER..... NAD and NADP
(NAD for catabolism ) (NADP for anabolism)
This coenzyme is involved in catabolism .....ANSWER..... NAD
(Niacin) (Dilated vessels on this CAT)
This enzyme is a vasodilator and has a hypocholesterolemic
effect (lowers cholesterol) .....ANSWER..... Niacin
This coenzyme is involved in anabolism .....ANSWER..... NADP
Niacin is involved in what types of enzymes? .....ANSWER.....
Dehydrogenase enzymes.
NAD is used at what part of the krebs cycle? .....ANSWER.....
Malate to oxaloacetate using malate dehydrogenase. (M-N-O)
Deficiency in niacin, characterized by dermatitis, diarrhea, and
dementia. .....ANSWER..... Pellagra
What is the active form of B5- Pantothenic acid? .....ANSWER.....
Coenzyme A, CoASH.
NBCE PART 1- BIOCHEMISTRY LATEST 2025 COMPLETE
EXAM| ACTUAL EXAM QUESTIONS WITH CORRECT
VERIFIED ANSWERS/ ALREADY GRADED A+
Coenzymes are formed where? .....ANSWER..... In the intestinal
mucosa
Coenzymes are formed from what vitamin? .....ANSWER..... B
vitamins
What are the different types of B vitamins? .....ANSWER..... B1:
Thiamin, B2: Riboflavin, B3: Niacin, B5: Panthotenic Acid, B6:
Pyridoxine, B7: Biotin, B9: Folic Acid, B12: Cyanocobalamine,
These Ribs Need PaPys B*tchin Food Cyanide
The active coenzyme created from thiamine (B1) is?
.....ANSWER..... Thiamine pyrophosphate
Thiamine pyrophosphate has what function? .....ANSWER.....
Decarboxylation.
,Page 2 of 51
In order to convert pyruvic acid to acetyl CoA, we need?
.....ANSWER..... Thiamine pyrophosphate
Beri-Beri is a deficiency in? .....ANSWER..... Thiamine. Causes
numbness in fingers and toes. (Rub berrys on thighs)
Wernicke-korsakoffs is seen in who? .....ANSWER..... Alcoholics,
from a deficiency in thiamine
What B-Vitamin contains sulfur? .....ANSWER..... B1: Thiamine, B5:
Pantothenic acid.
The isoallaxazine ring system (Flavin Ring) is seen in what B-
vitamin? .....ANSWER..... Riboflavin
What are the active coenzymes for riboflavin? .....ANSWER.....
FMN and FAD
Riboflavin is involved in? .....ANSWER..... Dehydrogenase
enzymes:
,Page 3 of 51
What happens with hydrogen amounts during
oxidation/reduction? .....ANSWER..... OIL RIG (Oxidation LOSE
hydrogen) Reduction (GAIN hydrogen)
Succinate uses what to turn into Fumarate? .....ANSWER.....
Succinate dehydrogenase
FAD, from riboflavin, will gain 2Hs, turning it into FADH2 during
what phase of the krebs cycle? .....ANSWER..... When succinate
turns into fumarate. (S-F-F)
The two Hs gained from FAD turning into FADH2 can be brought
to the electron transport chain and cashed in for how many ATP?
.....ANSWER..... 2 ATPs!!
Deficiency in riboflavin leads to? .....ANSWER..... Cheilosis
(Severe cracking of lips) Yellow urine
Niacin can be taken in from what amino acid? .....ANSWER.....
Tryptophan (Trip on a Fan at Night)
, Page 4 of 51
Niacins active coenzymes are .....ANSWER..... NAD and NADP
(NAD for catabolism ) (NADP for anabolism)
This coenzyme is involved in catabolism .....ANSWER..... NAD
(Niacin) (Dilated vessels on this CAT)
This enzyme is a vasodilator and has a hypocholesterolemic
effect (lowers cholesterol) .....ANSWER..... Niacin
This coenzyme is involved in anabolism .....ANSWER..... NADP
Niacin is involved in what types of enzymes? .....ANSWER.....
Dehydrogenase enzymes.
NAD is used at what part of the krebs cycle? .....ANSWER.....
Malate to oxaloacetate using malate dehydrogenase. (M-N-O)
Deficiency in niacin, characterized by dermatitis, diarrhea, and
dementia. .....ANSWER..... Pellagra
What is the active form of B5- Pantothenic acid? .....ANSWER.....
Coenzyme A, CoASH.
