B-Vitamins Trivia Questions and Answers

two orange and grapefruit halves on brown wooden surface

1: Which B vitamin is known as thiamine?
A: B1
B: B2
C: B3
D: B7
Correct Answer: A
Explanation: Thiamine is also called vitamin B1 and plays a key role in the catabolism of sugars and amino acids.

2: Which form of cobalamin is commonly found in vitamin supplements?
A: Cyanocobalamin
B: Methylcobalamin
C: Hydroxocobalamin
D: Adenosylcobalamin
Correct Answer: A
Explanation: Cyanocobalamin is a commonly used form of vitamin B12 in supplements because it is stable and easily converted to active forms by the body.

3: What is a coenzyme needed for in B vitamin functions?
A: It’s a structural component of the cell.
B: It catalyzes reactions in metabolic processes.
C: It stores energy for later use.
D: It helps with DNA replication.
Correct Answer: B
Explanation: B vitamins often function as coenzymes, which means they assist enzymes in catalyzing metabolic reactions in the body.

4: Which B vitamin deficiency is linked to neural tube defects during pregnancy?
A: B5
B: B7
C: B9
D: B12
Correct Answer: C
Explanation: Folate (B9) is crucial during pregnancy, and its deficiency can lead to neural tube defects.

5: Which vitamin plays a crucial role in energy transfer reactions through NAD and NADP?
A: B2
B: B3
C: B5
D: B7
Correct Answer: B
Explanation: Vitamin B3 (Niacin) is vital for energy transfer reactions in metabolism through its coenzyme forms NAD and NADP.

6: Riboflavin, known as B2, acts as a precursor for which coenzymes?
A: NAD and NADP
B: Coenzyme A
C: FAD and FMN
D: Thiamine pyrophosphate
Correct Answer: C
Explanation: Riboflavin is a precursor for FAD and FMN, which are necessary for flavoprotein enzyme reactions.

7: Which B vitamin is essential for the metabolism of all animal cells, particularly affecting DNA synthesis and regulation?
A: B1
B: B5
C: B7
D: B12
Correct Answer: D
Explanation: Vitamin B12 plays a critical role in the metabolism of all animal cells, including DNA synthesis and regulation.

8: What is the role of biotin (B7) in the body?
A: It’s involved in the metabolism of lipids, proteins, and carbohydrates.
B: It assists in the formation of red blood cells.
C: It acts as an antioxidant.
D: It helps with calcium absorption.
Correct Answer: A
Explanation: Biotin (B7) is essential for the metabolism of lipids, proteins, and carbohydrates.

9: In which type of foods is vitamin B12 not abundantly available?
A: Meat products
B: Dairy products
C: Fish and poultry
D: Plant products
Correct Answer: D
Explanation: Vitamin B12 is not commonly found in plant products, making it a concern for those on a vegan diet.

10: Which B vitamin helps in synthesizing neurotransmitters and regulating the immune system?
A: B5
B: B6
C: B9
D: B12
Correct Answer: B
Explanation: Vitamin B6 (Pyridoxine) aids in the synthesis of neurotransmitters and regulates the immune system.

11: What condition is caused by a deficiency in niacin (B3)?
A: Beriberi
B: Pellagra
C: Ariboflavinosis
D: Megaloblastic anemia
Correct Answer: B
Explanation: A deficiency in niacin (B3) causes pellagra, characterized by dermatitis, diarrhea, and dementia.

12: Which B vitamin is synthesized from pantothenic acid?
A: TPP
B: FMN
C: Coenzyme A
D: NADP
Correct Answer: C
Explanation: Pantothenic acid (B5) is synthesized into coenzyme A, which is important for fatty acid metabolism.

13: What is the common name for vitamin B9?
A: Biotin
B: Folate
C: Niacin
D: Thiamine
Correct Answer: B
Explanation: Vitamin B9 is commonly known as folate and is crucial for cellular growth and reproduction.

14: Supplement manufacturers often add large amounts of which B vitamin to energy drinks?
A: B2
B: B5
C: B6
D: B12
Correct Answer: D
Explanation: Vitamin B12 is commonly added in large amounts to energy drinks to help boost energy metabolism.

15: What is enriched flour?
A: Flour that has added fiber.
B: Flour with added gluten.
C: Flour with added B vitamins.
D: Flour with added minerals.
Correct Answer: C
Explanation: Enriched flour has B vitamins such as thiamine, riboflavin, niacin, and folic acid added back after processing.

16: Which vitamin is needed to synthesize fatty acids and gluconeogenesis?
A: B3
B: B6
C: B7
D: B9
Correct Answer: C
Explanation: Vitamin B7 (biotin) plays a crucial role in synthesizing fatty acids and gluconeogenesis.

17: How is vitamin B6 often delivered to reverse severe deficiency?
A: Through dietary changes
B: Through supplements
C: Through energy drinks
D: By injection
Correct Answer: D
Explanation: In cases of severe B6 deficiency, it is often delivered by injection to rapidly correct the deficiency.

18: What role does pyridoxal 5′-phosphate play in the body?
A: It helps with muscle contraction.
B: It acts as a coenzyme in amino acid metabolism.
C: It regulates heart rate.
D: It boosts immunity.
Correct Answer: B
Explanation: Pyridoxal 5′-phosphate, the active form of vitamin B6, acts as a coenzyme in many enzymatic reactions involving amino acid metabolism.

19: Which vitamin deficiency can lead to severe neurological disorders in infants?
A: B1
B: B6
C: B7
D: B12
Correct Answer: C
Explanation: Biotin deficiency (B7) can lead to severe neurological disorders in infants.

20: Which deficiency disease is characterized by symptoms like weight loss, emotional disturbances, and edema?
A: Pellagra
B: Beriberi
C: Ariboflavinosis
D: Megaloblastic anemia
Correct Answer: B
Explanation: Beriberi, caused by thiamine (B1) deficiency, includes symptoms like weight loss, emotional disturbances, and edema.

21: Which vitamin, when deficient, can cause acne and paresthesia?
A: B2
B: B5
C: B6
D: B12
Correct Answer: B
Explanation: A deficiency in pantothenic acid (B5) can lead to acne and paresthesia, though it is uncommon.

22: Which form of vitamin B12 is involved in the methionine synthase reaction?
A: Cyanocobalamin
B: Methylcobalamin
C: Hydroxocobalamin
D: Adenosylcobalamin
Correct Answer: B
Explanation: Methylcobalamin is involved in the methionine synthase reaction, which is critical for DNA methylation and synthesis.

23: Which B vitamin is particularly important for red blood cell production?
A: B6
B: B9
C: B12
D: All of the above
Correct Answer: D
Explanation: Vitamins B6, B9 (folate), and B12 are all crucial for red blood cell production.

24: In what form does niacin function to transfer hydrogens and electrons during metabolic reactions?
A: Nicotinic acid
B: NAD
C: NADH
D: NADP
Correct Answer: B
Explanation: In its coenzyme form, niacin (vitamin B3) functions as NAD to transfer hydrogens and electrons during metabolic reactions.

25: What symptoms can excessive intake of niacin cause?
A: Hair loss
B: Diarrhea
C: Skin flushing
D: Blurred vision
Correct Answer: C
Explanation: Excessive intake of niacin can cause skin flushing, often accompanied by an itching or tingling sensation.

26: Folate is especially vital in aiding rapid growth in which demographic?
A: Athletes
B: Pregnant women
C: Elderly
D: Infants
Correct Answer: B
Explanation: Folate is vital for rapid cell division and growth, making it critically important during pregnancy.

27: Which vitamin helps in the synthesis of neurotransmitters like serotonin and dopamine?
A: B2
B: B5
C: B6
D: B7
Correct Answer: C
Explanation: Vitamin B6 (pyridoxine) is involved in the synthesis of neurotransmitters such as serotonin and dopamine.

28: As a coenzyme, thiamine pyrophosphate (TPP) is involved in which metabolic process?
A: Lipid metabolism
B: Carbohydrate metabolism
C: Protein synthesis
D: DNA replication
Correct Answer: B
Explanation: Thiamine pyrophosphate (TPP) is an active form of vitamin B1 involved in carbohydrate metabolism.

29: What food sources have little to no B12 content?
A: Meat products
B: Dairy products
C: Fish
D: Leafy green vegetables
Correct Answer: D
Explanation: Leafy green vegetables have little to no vitamin B12 content.

30: Which condition results from a deficiency of vitamin B12 and can involve irreversible nerve damage?
A: Pellagra
B: Beriberi
C: Megaloblastic anemia
D: Pernicious anemia
Correct Answer: D
Explanation: Pernicious anemia can result from a vitamin B12 deficiency and, if untreated, can lead to irreversible nerve damage.

31: Legumes are a good source of which B vitamins?
A: B1 and B3
B: B5 and B7
C: B6 and B9
D: All of the above
Correct Answer: D
Explanation: Legumes are a good source of several B vitamins including B1, B3, B5, B6, and B9.

32: What does enriched flour indicate on food labels?
A: It has less dietary fiber.
B: It has added sugar.
C: It has added B vitamins.
D: It has added protein.
Correct Answer: C
Explanation: Enriched flour indicates that B vitamins such as thiamine, riboflavin, niacin, and folic acid have been added back after processing.

33: Which vitamin is specifically involved in the synthesis of acetylcholine and antibodies?
A: B2
B: B5
C: B6
D: B7
Correct Answer: B
Explanation: Pantothenic acid (B5) in the form of coenzyme A is involved in the synthesis of acetylcholine and antibodies.

34: Deficiency in which vitamin causes macrocytic anemia and elevated levels of homocysteine?
A: B2
B: B5
C: B6
D: B9
Correct Answer: D
Explanation: Folate (B9) deficiency can result in macrocytic anemia and high levels of homocysteine.

35: Which B vitamin plays a role in the electron transport chain?
A: B1
B: B2
C: B5
D: B7
Correct Answer: B
Explanation: Riboflavin (B2) is involved in the electron transport chain, which is a key component of cellular respiration.

36: What condition results from a deficiency of riboflavin (B2)?
A: Ariboflavinosis
B: Pellagra
C: Pernicious anemia
D: Beriberi
Correct Answer: A
Explanation: A deficiency in riboflavin (B2) leads to ariboflavinosis, which includes symptoms like cheilosis and glossitis.

37: Which B vitamin is known as pyridoxine?
A: B3
B: B5
C: B6
D: B7
Correct Answer: C
Explanation: Pyridoxine is another name for vitamin B6 and is involved in numerous metabolic processes.

38: Excessive intake of which vitamin can mask B12 deficiency?
A: B1
B: B3
C: B6
D: B9
Correct Answer: D
Explanation: High intake of folic acid (B9) can mask a B12 deficiency, potentially leading to neurological damage.

39: Which vitamin deficiency can lead to scurvy?
A: B1
B: B2
C: B3
D: None of the above
Correct Answer: D
Explanation: Scurvy is caused by a deficiency in vitamin C, not B vitamins.

40: Which food is a good source of biotin (B7)?
A: Liver
B: Fish
C: Eggs
D: All of the above
Correct Answer: D
Explanation: Liver, fish, and eggs are all good dietary sources of biotin (B7).

41: Which vitamin deficiency causes Wernicke encephalopathy characterized by impaired sensory perception?
A: B1
B: B2
C: B3
D: B12
Correct Answer: A
Explanation: A deficiency in thiamine (B1) can cause Wernicke encephalopathy, leading to impaired sensory perception.

42: Which vitamin is necessary for fatty acid oxidation and is a part of coenzyme A?
A: B2
B: B3
C: B5
D: B6
Correct Answer: C
Explanation: Pantothenic acid (B5) is a component of coenzyme A, important for fatty acid oxidation.

43: Iron transportation in hemoglobin involves which cofactor derived from B vitamins?
A: TPP
B: NADH
C: Heme B
D: THF
Correct Answer: C
Explanation: Heme B, which involves B vitamins like B5 and B9, holds the iron atom in place in hemoglobin for oxygen transport.

44: What is the tolerable upper intake level for folate (B9)?
A: 100 mcg/day
B: 300 mcg/day
C: 600 mcg/day
D: 1 mg/day
Correct Answer: D
Explanation: The tolerable upper intake level for folate is 1 mg/day due to the risk of masking a B12 deficiency.

45: Which B vitamin is also known as folate and is crucial for DNA synthesis and repair?
A: B1
B: B3
C: B5
D: B9
Correct Answer: D
Explanation: Folate (B9) is essential for DNA synthesis, repair, and methylation.

46: What condition results from a deficiency of folic acid (B9)?
A: Pellagra
B: Beriberi
C: Macrocytic anemia
D: Ariboflavinosis
Correct Answer: C
Explanation: A deficiency in folic acid (B9) can lead to macrocytic anemia, characterized by larger than normal red blood cells.

47: Which B vitamin involves NAD+ and NADP+ in its metabolic functions?
A: B2
B: B3
C: B5
D: B7
Correct Answer: B
Explanation: Niacin (B3) utilizes NAD+ and NADP+ for its crucial role in metabolic reactions.

48: The active form of B6 is known as what?
A: Coenzyme A
B: TPP
C: PLP
D: FAD
Correct Answer: C
Explanation: The active form of vitamin B6 is pyridoxal 5′-phosphate (PLP), which serves as a cofactor in enzyme reactions.

49: What symptoms can lead to confusion about adequate B12 intake from plant-based foods?
A: Measuring through physical changes
B: Confounding labeling practices
C: Bacterial response methods in USP
D: Rapid taste changes
Correct Answer: C
Explanation: The confusion about B12 in plant-based foods arises because the USP method measures bacterial response, not the actual B12 usable by the human body.

50: Enriched flour often has what vitamins added back after processing?
A: Vitamin A and D
B: Vitamin C and E
C: Thiamine, riboflavin, niacin, and folic acid
D: Calcium and iron
Correct Answer: C
Explanation: Enriched flour typically has thiamine, riboflavin, niacin, and folic acid added back after processing.

51: Which vitamin can lead to over-reporting of content due to bacterial activity in testing?
A: B1
B: B3
C: B12
D: B5
Correct Answer: C
Explanation: The content of vitamin B12 can be over-reported due to bacterial activity measured in testing methods.

52: Which B vitamin is heavily added to energy drinks to boost metabolism?
A: B2
B: B5
C: B6
D: B12
Correct Answer: D
Explanation: Vitamin B12 is commonly added to energy drinks to help boost metabolic processes.

53: What is one of the major effects of riboflavin (B2) in the body?
A: DNA repair
B: Antioxidant activity
C: Electron transport chain participation
D: Blood clotting
Correct Answer: C
Explanation: Riboflavin (B2) plays a major role in the electron transport chain, which is vital for ATP production.

54: What can untreated B12 deficiency potentially lead to?
A: Foot sores
B: Vision loss
C: Irreversible nerve damage
D: Kidney stones
Correct Answer: C
Explanation: Untreated vitamin B12 deficiency can lead to irreversible nerve damage and severe neurological issues.

55: Which vitamin’s deficiency leads to symptoms resembling mental confusion and aggression?
A: B2
B: B5
C: B6
D: B3
Correct Answer: D
Explanation: Niacin (B3) deficiency causes pellagra, which includes symptoms like mental confusion and aggression.

56: Which nutrient might vegans need to supplement due to its scarcity in plant sources?
A: B1
B: B2
C: B12
D: B9
Correct Answer: C
Explanation: Vegans often need to supplement vitamin B12 as it is scarce in plant sources.

57: What type of anemia is caused by a deficiency of vitamin B12?
A: Sideroblastic anemia
B: Microcytic anemia
C: Hemolytic anemia
D: Macrocytic anemia
Correct Answer: D
Explanation: A deficiency in vitamin B12 causes macrocytic anemia, characterized by larger than normal red blood cells.

58: How are B vitamins generally excreted from the body?
A: Through sweat
B: Through urine
C: Through respiration
D: Through feces
Correct Answer: B
Explanation: B vitamins, being water-soluble, are usually excreted through urine.

59: What issue can arise from folate (B9) supplementation in large doses?
A: Memory loss
B: Neural tube defects
C: Masking B12 deficiency
D: Low

C: Masking B12 deficiency
Explanation: Large doses of folate (B9) can mask B12 deficiency, which may lead to irreversible neurological damage.

60: Beriberi, characterized by heart failure and muscle weakness, is caused by a deficiency in which vitamin?
A: B1
B: B2
C: B6
D: B12
Correct Answer: A
Explanation: Beriberi is caused by a deficiency in thiamine (B1) and can result in severe nervous and cardiovascular system problems.

Disclaimer: Please consult a physician before making any changes to your health regimen.

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