FNH 250 - ENERGY METABOLISM UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. What is the main role of B-vitamins in energy metabolism?
Answer:
They act as coenzymes required by enzymes that release energy from macronutrients.
Question:
2. Do B-vitamins directly provide energy?
Answer:
No— they help release energy but do not supply calories.
Question:
3. Where are B-vitamins most concentrated in grains?
Answer:
In the germ, bran, and husk layers (removed during milling).
Question:
4. Why are enriched grains important?
Answer:
Milling removes B-vitamins, so flour and cereals are enriched with thiamin, riboflavin, niacin, folate, and
iron.
Question:
5. Which amino acid can be converted to niacin?
Answer:
Tryptophan (60 mg = 1 mg niacin equivalent).
Question:
6. Who is at risk for B-vitamin deficiency?
Answer:
Alcoholics, elderly, malnourished, homeless.
Question:
7. Coenzyme form of thiamin?
Answer:
TPP (Thiamin Pyrophosphate).
Question:
8. Main roles of thiamin?
Answer:
CHO metabolism, BCAA metabolism, DNA/RNA synthesis, nerve function.
, Question:
9. Thiamin deficiency disease?
Answer:
Beriberi - symptoms: muscle wasting, nerve damage, edema, difficulty walking.
Question:
10. Main food sources of thiamin?
Answer:
Pork*, enriched grains, legumes, whole grains, sunflower seeds.
Question:
11. Thiamin toxicity?
Answer:
None (no UL).
Question:
12. Coenzyme forms of riboflavin?
Answer:
FMN and FAD.
Question:
13. Main roles?
Answer:
Energy release from macronutrients, convert B6 ’ PLP, synthesize niacin from tryptophan, antioxidant
enzyme support.
Question:
14. Riboflavin deficiency name?
Answer:
Ariboflavinosis - symptoms: cheilosis (inflammation, lesions, and cracks at corner of mouth), stomatitis
(inflammation in tissue lining lips and mouth), glossitis (inflammation of tongue), dermatitis
(inflammation of skin).
Question:
15. Key sources?
Answer:
Milk*, enriched grains, dark green vegetables, mushrooms.
Question:
16. What destroys riboflavin?
Answer:
Light
Question:
17. Riboflavin toxicity?
QUESTIONS AND CORRECT ANSWERS
Question:
1. What is the main role of B-vitamins in energy metabolism?
Answer:
They act as coenzymes required by enzymes that release energy from macronutrients.
Question:
2. Do B-vitamins directly provide energy?
Answer:
No— they help release energy but do not supply calories.
Question:
3. Where are B-vitamins most concentrated in grains?
Answer:
In the germ, bran, and husk layers (removed during milling).
Question:
4. Why are enriched grains important?
Answer:
Milling removes B-vitamins, so flour and cereals are enriched with thiamin, riboflavin, niacin, folate, and
iron.
Question:
5. Which amino acid can be converted to niacin?
Answer:
Tryptophan (60 mg = 1 mg niacin equivalent).
Question:
6. Who is at risk for B-vitamin deficiency?
Answer:
Alcoholics, elderly, malnourished, homeless.
Question:
7. Coenzyme form of thiamin?
Answer:
TPP (Thiamin Pyrophosphate).
Question:
8. Main roles of thiamin?
Answer:
CHO metabolism, BCAA metabolism, DNA/RNA synthesis, nerve function.
, Question:
9. Thiamin deficiency disease?
Answer:
Beriberi - symptoms: muscle wasting, nerve damage, edema, difficulty walking.
Question:
10. Main food sources of thiamin?
Answer:
Pork*, enriched grains, legumes, whole grains, sunflower seeds.
Question:
11. Thiamin toxicity?
Answer:
None (no UL).
Question:
12. Coenzyme forms of riboflavin?
Answer:
FMN and FAD.
Question:
13. Main roles?
Answer:
Energy release from macronutrients, convert B6 ’ PLP, synthesize niacin from tryptophan, antioxidant
enzyme support.
Question:
14. Riboflavin deficiency name?
Answer:
Ariboflavinosis - symptoms: cheilosis (inflammation, lesions, and cracks at corner of mouth), stomatitis
(inflammation in tissue lining lips and mouth), glossitis (inflammation of tongue), dermatitis
(inflammation of skin).
Question:
15. Key sources?
Answer:
Milk*, enriched grains, dark green vegetables, mushrooms.
Question:
16. What destroys riboflavin?
Answer:
Light
Question:
17. Riboflavin toxicity?
