NCCAOM BIOMEDICINE FINAL EXAM
COMPREHENSIVE REVIEW: VITAMINS, MINERALS & NUTRITIONAL
DEFICIENCIES
200 EXAM-STYLE QUESTIONS WITH CORRECT ANSWERS &
RATIONALES
GRADED A+ | PASS GUARANTEED | MOST EXAMINED TOPICS
Question 1
A patient presents with night blindness and xerophthalmia. Which
vitamin deficiency is most likely?
A) Vitamin B1
B) Vitamin A
C) Vitamin C
D) Vitamin E
Correct Answer: B) Vitamin A
Rationale: Vitamin A is essential for maintaining healthy vision,
particularly in low-light conditions. Deficiency leads to night blindness
and can progress to xerophthalmia, a condition characterized by
dryness of the conjunctiva and cornea.
Question 2
Which fat-soluble vitamin is essential for blood clotting and bone
metabolism?
A) Vitamin A
B) Vitamin D
C) Vitamin E
,D) Vitamin K
Correct Answer: D) Vitamin K
Rationale: Vitamin K is a cofactor for the carboxylation of glutamic acid
residues in proteins involved in blood coagulation. It is also essential for
the activation of osteocalcin, a protein involved in bone mineralization.
Question 3
A patient has a history of osteoporosis and lives in a region with limited
sunlight. Which vitamin deficiency is most likely contributing to their
condition?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Correct Answer: B) Vitamin D
Rationale: Vitamin D is synthesized in the skin upon exposure to UVB
radiation. It is essential for calcium absorption in the gut. Deficiency
leads to decreased calcium absorption, resulting in bone
demineralization and an increased risk of osteoporosis.
Question 4
A patient on warfarin therapy is advised to maintain a consistent intake
of which vitamin to avoid fluctuations in their INR?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Correct Answer: D) Vitamin K
Rationale: Warfarin is a vitamin K antagonist. It inhibits the enzyme
vitamin K epoxide reductase, which is necessary for the recycling of
,vitamin K. Fluctuations in dietary vitamin K intake can alter the
effectiveness of warfarin, affecting the patient's INR.
Question 5
A patient presents with a pruritic, erythematous rash on sun-exposed
areas. This is a classic sign of a deficiency in which vitamin?
A) Vitamin B2
B) Vitamin B3
C) Vitamin B6
D) Vitamin B12
Correct Answer: B) Vitamin B3
Rationale: Pellagra is caused by a deficiency of niacin (Vitamin B3). The
classic presentation is the "three Ds": dermatitis, diarrhea, and
dementia. The dermatitis is characterized by a rash on sun-exposed
areas.
Question 6
A patient is diagnosed with macrocytic anemia and presents with
peripheral neuropathy. Which vitamin deficiency is most likely?
A) Vitamin B1
B) Vitamin B6
C) Vitamin B9
D) Vitamin B12
Correct Answer: D) Vitamin B12
Rationale: Cobalamin (Vitamin B12) is required for DNA synthesis and
myelin formation. Deficiency leads to megaloblastic anemia due to
impaired DNA synthesis and neurological symptoms such as peripheral
neuropathy due to demyelination.
, Question 7
Scurvy is caused by a deficiency of which vitamin?
A) Vitamin B9
B) Vitamin B12
C) Vitamin C
D) Vitamin D
Correct Answer: C) Vitamin C
Rationale: Vitamin C (ascorbic acid) is a cofactor for prolyl and lysyl
hydroxylases, which are essential for collagen synthesis. Deficiency
leads to impaired collagen cross-linking, resulting in fragile capillaries,
poor wound healing, and characteristic symptoms of scurvy.
Question 8
A premature infant is at high risk for developing hemolytic anemia and
retrolental fibroplasia. Which vitamin should be supplemented to
prevent this?
A) Vitamin A
B) Vitamin C
C) Vitamin E
D) Vitamin K
Correct Answer: C) Vitamin E
Rationale: Vitamin E is a potent antioxidant that protects cell
membranes, including red blood cells, from oxidative stress. Premature
infants often have low levels of vitamin E and are susceptible to
oxidative damage to their RBCs (causing hemolytic anemia) and retinal
blood vessels (retrolental fibroplasia).
Question 9
Which mineral is a crucial component of hemoglobin and myoglobin?
A) Copper
COMPREHENSIVE REVIEW: VITAMINS, MINERALS & NUTRITIONAL
DEFICIENCIES
200 EXAM-STYLE QUESTIONS WITH CORRECT ANSWERS &
RATIONALES
GRADED A+ | PASS GUARANTEED | MOST EXAMINED TOPICS
Question 1
A patient presents with night blindness and xerophthalmia. Which
vitamin deficiency is most likely?
A) Vitamin B1
B) Vitamin A
C) Vitamin C
D) Vitamin E
Correct Answer: B) Vitamin A
Rationale: Vitamin A is essential for maintaining healthy vision,
particularly in low-light conditions. Deficiency leads to night blindness
and can progress to xerophthalmia, a condition characterized by
dryness of the conjunctiva and cornea.
Question 2
Which fat-soluble vitamin is essential for blood clotting and bone
metabolism?
A) Vitamin A
B) Vitamin D
C) Vitamin E
,D) Vitamin K
Correct Answer: D) Vitamin K
Rationale: Vitamin K is a cofactor for the carboxylation of glutamic acid
residues in proteins involved in blood coagulation. It is also essential for
the activation of osteocalcin, a protein involved in bone mineralization.
Question 3
A patient has a history of osteoporosis and lives in a region with limited
sunlight. Which vitamin deficiency is most likely contributing to their
condition?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Correct Answer: B) Vitamin D
Rationale: Vitamin D is synthesized in the skin upon exposure to UVB
radiation. It is essential for calcium absorption in the gut. Deficiency
leads to decreased calcium absorption, resulting in bone
demineralization and an increased risk of osteoporosis.
Question 4
A patient on warfarin therapy is advised to maintain a consistent intake
of which vitamin to avoid fluctuations in their INR?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Correct Answer: D) Vitamin K
Rationale: Warfarin is a vitamin K antagonist. It inhibits the enzyme
vitamin K epoxide reductase, which is necessary for the recycling of
,vitamin K. Fluctuations in dietary vitamin K intake can alter the
effectiveness of warfarin, affecting the patient's INR.
Question 5
A patient presents with a pruritic, erythematous rash on sun-exposed
areas. This is a classic sign of a deficiency in which vitamin?
A) Vitamin B2
B) Vitamin B3
C) Vitamin B6
D) Vitamin B12
Correct Answer: B) Vitamin B3
Rationale: Pellagra is caused by a deficiency of niacin (Vitamin B3). The
classic presentation is the "three Ds": dermatitis, diarrhea, and
dementia. The dermatitis is characterized by a rash on sun-exposed
areas.
Question 6
A patient is diagnosed with macrocytic anemia and presents with
peripheral neuropathy. Which vitamin deficiency is most likely?
A) Vitamin B1
B) Vitamin B6
C) Vitamin B9
D) Vitamin B12
Correct Answer: D) Vitamin B12
Rationale: Cobalamin (Vitamin B12) is required for DNA synthesis and
myelin formation. Deficiency leads to megaloblastic anemia due to
impaired DNA synthesis and neurological symptoms such as peripheral
neuropathy due to demyelination.
, Question 7
Scurvy is caused by a deficiency of which vitamin?
A) Vitamin B9
B) Vitamin B12
C) Vitamin C
D) Vitamin D
Correct Answer: C) Vitamin C
Rationale: Vitamin C (ascorbic acid) is a cofactor for prolyl and lysyl
hydroxylases, which are essential for collagen synthesis. Deficiency
leads to impaired collagen cross-linking, resulting in fragile capillaries,
poor wound healing, and characteristic symptoms of scurvy.
Question 8
A premature infant is at high risk for developing hemolytic anemia and
retrolental fibroplasia. Which vitamin should be supplemented to
prevent this?
A) Vitamin A
B) Vitamin C
C) Vitamin E
D) Vitamin K
Correct Answer: C) Vitamin E
Rationale: Vitamin E is a potent antioxidant that protects cell
membranes, including red blood cells, from oxidative stress. Premature
infants often have low levels of vitamin E and are susceptible to
oxidative damage to their RBCs (causing hemolytic anemia) and retinal
blood vessels (retrolental fibroplasia).
Question 9
Which mineral is a crucial component of hemoglobin and myoglobin?
A) Copper
