Most important Vitamins MCQs with Answers for competitive exams and one paper mcqs test preparation online.
Vitamins MCQs
Which of the following vitamins acts as hormone?
A. Vitamin D
B. Vitamin B
C. Vitamin C
D. Vitamin E
Of prime importance in the structure of flavoproteins is:
A. Vitamin B6
B. Vitamin B2
C. Vitamin B1
D. Vitamin A
Which vitamin is synthesized by intestinal bacteria :
A. Vitamin B
B. Vitamin A
C. Vitamin D
D. Vitamin K
Malonyl aciduria is seen in deficiency of:
A. Pyridoxine
B. B12
C. Folic acid
D. Riboflavin
Which vitamin is the most indispensable during mitosis:
A. Folic acid
B. Pantothenic acid
C. Ascorbic acid
D. Aspartic acid
Beri-beri is caused due to the deficiency of:
A. Thiamine
B. Pyridoxine
C. Ascorbic acid
D. Riboflavin
A patient with chronic renal failure and bone pains will have deficiency of which vitamin:
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Cereals are deficient in:
A. Vitamin C
B. Vitamin B complex
C. Iron
D. Calcium
Vitamin C effects:
A. Maturation of procollagen
B. Formation of osteoid matrix
C. Calcification of osteoid
D. Both A and B
Vitamin B12 is:
A. Extrinsic factor of castle
B. Intrinsic factor of castle
C. Cyano cobalamin
D. A fat soluble vitamin
Specific disease caused by vitamin B1 deficiency:
A. Pellagra
B. Angular cheilitis
C. Megaloblastic anemia
D. Peripheral polyneuritis
Fast soluble vitamins are:
A. A, B , D, K
B. A, D. E, K
C. A, B, E, K
D. A, C, E, K
Deficiency of vitamin A causes the following except:
A. Night blindness
B. Corneal dryness
C. Bitot’s spots
D. Myopia
Active form of vitamin D in kidney is:
A. 1 dihydroxy cholecalciferol
B. 25 hydroxy cholecalciferol
C. 1,25 dihydroxy cholecalciferol
D. 7 dihydroxy calciferol
The vitamin that facilitates iron absorption:
A. Folic acid
B. Ascorbic acid
C. Biotin
D. Para amino benzoic acid
Vitamin K antagonizes:
A. Corticosteroids
B. Thrombin formation
C. Bishydroxy coumarin
D. Production of clotting factors by liver
Vitamin K:
A. Helps in formation of prothrombin
B. Inhibition of antithrombin
C. Prevention of capillary fragility
D. Stimulation of haematopoiesis in red bone marrow
Rhodopsin deficiency is chiefly associated with:
A. Vitamin D deficiency
B. Rickets
C. Vitamin A deficiency
D. Scurvy
Deficiency of nicotinic acid results in:
A. Beri-beri
B. Pellagra
C. Night blindness
D. Pernicious anemia
Scurvy is the result of deficiency of:
A. Vitamin A
B. Vitamin C
C. Vitamin B
D. Vitamin D
Daily Vitamin A intake:
A. 1000 I.U
B. 2000 I.U
C. 3000 I.U
D. 4000 I.U
The function of vitamin A is/are related to which of the following:
A. Retinol
B. Retinal
C. Retinoic acid
D. All of the above
The 3 – D’s dermatitis, diarrhoea and dementia are seen in deficiency of:
A. Thiamin
B. Riboflavin
C. Niacin
D. Pyridoxine
Absorption of vitamin K requires normal absorption of:
A. Fat
B. Amino acids
C. Calcium
D. Glucose
Mineral present in Vit B12 is:
A. Selenium
B. Cobalt
C. Iron
D. Calcium
Vit-K deficiency is indicated by:
A. Low platelet count
B. Increased prothrombin time
C. Decreased prothrombin time
D. None of the above
The reaction inhibited in thiamine deficiency is:
A. Pyruvate to acetyl CoA
B. Citrate to alpha ketoglutarate
C. Succinyl CoA to fumarate
D. None of the above
Vitamin K dependent clotting factors are:
A. II
B. VII
C. IX
D. X
E. All of the above
Coenzyme forms are correctly matched except:
A. Biotin – carboxylated biotin
B. Vitamin B – ATP
C. Niacin – NAD+NADP
D. Vitamin B2 – FMN+FAC
Vit B12 is absorbed in the:
A. Stomach
B. Terminal ileum
C. Lower jejunum
D. Proximal ileum
Deficiency of vitamin C causes the following except:
A. Painful swollen gums
B. Abnormal Collagen
C. Anaemia
D. Diarrhoea
Vitamin B12 acts as a coenzyme to which one of the following enzyme :
A. Isocitrate dehydrogenase
B. Homocyteine methyl transferase
C. Glycogen synthase
D. G-6-P dehydrogenase
Vitamin A:
A. Is water soluble
B. Deficiency causes impaired vision
C. Maintains normal plasma calcium levels
D. Is required for formation of clotting factors
The maximum content of vitamin E is found in:
A. Cold liver oil
B. Fish liver oil
C. Wheat germ oil
D. Liver
One molecule of B-carotene gives rise to:
A. 1 unit of Vitamin A
B. 2 unit of Vitamin A
C. 3 unit of Vitamin A
D. 4 unit of Vitamin A
Thiamine deficiency causes decreased energy production because:
A. It is required for the process of transmination
B. It is co-factor in oxidative reduction
C. It is co-enzyme for transketolase in pentose phosphate pathway
D. It is co-enzyme for pyruvate dehydrogenase
1st clinical sign of vitamin A deficiency is:
A. night blindness
B. bitot’s spots
C. xerostomia
D. conjunctival xeroses
The mineral having sparing action on Vitamin E:
A. Chromium
B. Iron
C. Iodine
D. Selenium
Which vitamin is related to a co-factor in glycine metabolism is:
A. Vit E
B. Folic acid
C. Thiamine
D. Cobalamine
Vitamin C is present in largest amount in the body in:
A. Eye
B. Kidneys
C. Testes
D. Adrenal cortex
Tryptophan load test helps in the evaluation of deficiency of the vitamin:
A. Folic acid
B. Niacinamide
C. Pyridoxine
D. Cyano cobolamine
Vitamin C is present in largest amount in the body in:
A. Eye
B. Kidneys
C. Testes
D. Adrenal cortex
Most of vitamin B12 in the body is stored as:
A. Methyl B12
B. Hydroxy B12
C. Cyano cobalamine
D. None of the above
The action of vitamin K in formation of clotting factor is through:
A. Post transcription
B. Post translation
C. Golgi complex
D. Endoplasmic reticulum
Tocopherol is associated with:
A. Vitamin A
B. Vitamin E
C. Vitamin K
D. Vitamin D
Ascorbic acid:
A. Is a reducing agent
B. Decrease iron absorption
C. Is harmless in high doses
D. Is requirement for lysyl oxidase
Which of the following factors delay wound healing:
A. Vitamin B12 deficiency
B. Ascorbic acid deficiency
C. Infection
D. B & C option
Xerophthalmia is caused by:
A. Vitamin A deficiency
B. Vitamin D deficiency
C. Vitamin C deficiency
D. Vitamin K deficiency
Average daily dose of vitamin C is:
A. 30 – 40 mg
B. 50 – 60 mg
C. 60 – 100 mg
D. 100 – 150 mg
Vitamin associated with one carbon transfer is:
A. Niacin
B. Thiamine
C. Ascorbic acid
D. Folic acid
Pernicious anaemia occurs in:
A. Vit B1 deficiency
B. Vit B12 deficiency
C. Vit C deficiency
D. Vit D deficiency
Which of the following is the poorest source of vitamin C:
A. Milk
B. Cabbage
C. Guava
D. Radish
Coenzyme A contains which of the following vitamins:
A. Biotin
B. Pyridoxine
C. Pantothenic acid
D. Niacin
The amino acid from which niacin synthesized is:
A. Tyrosine
B. Tryptophan
C. Threonine
D. Histidine
Collagen formation is affected in deficiency of:
A. Vit A
B. Vit C
C. Vit B2
D. Vit D
Niacin & riboflavin help in:
A. Redox reactions
B. Transamination reaction
C. Methyl group transfer
D. Amine group transfer
Which of the following are the sources of Vit C:
A. Apple
B. Fresh green vegetables
C. Citrus fruits
D. Both B and C
Avidin influences which of the following vitamins :
A. Biotin
B. Niacin
C. Thiamine
D. Phylloquinone
FIGLU excretion test is to estimate deficiency of:
A. Vitamin K
B. Vitamin B6
C. Vitamin folic acid
D. Niacin
Deficiency of vitamin C causes the following except:
A. Defective collagen synthesis
B. Soft swollen gums
C. Pigeon chest
D. Subcutaneous & other hemorrhage
Peripheral neuropathy due to deficiency of vitamin is seen with:
A. Pyridoxine
B. Vit E
C. Vit A
D. Pantothenic acid
Consumption of raw egg white in the diet may result in the deficiency of:
A. Riboflavin
B. Biotin
C. Thiamine
D. Pyridoxine
Thiamine deficiency can be diagnosed by measuring:
A. Thiamine levels in blood
B. Alkaline phosphatase levels in blood
C. Transketolase activity in RBC
D. Plasma pyruvate and lactic acid levels
Both Vitamin K and C are involved in:
A. The synthesis of clotting factors
B. Post translational modifications
C. Antioxidant mechanisms
D. The microsomal hydroxylation reactions
Biotin is required for the activity of:
A. Pyruvate carboxylase
B. Lactate dehydrogenase
C. Succinate thiokinase
D. Phosphohexose isomerase
Aniacinosis results in:
A. Perleche
B. Beri beri
C. Pellagra
D. Nyctalopia
Who is known for his work on scurvy :
A. Fracastorius
B. James lind
C. John snow
D. Edward Jenner
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