(A) Both liver and kidney
(B) Intestine
(C) Adipose tissue
(D) Muscle
Tag: Biochemistry Mcqs
The β-ring of 7-dehydrocholesterol is cleaved to form cholecalciferol by?
(A) Infrared light
(B) Dim light
(C) Ultraviolet irridation with sunlight
(D) Light of the tube lights
One international unit (I.U) of vitamin D is defined as the biological activity of?
(A) 0.025 μg of cholecalciferol
(B) 0.025 μg of 7-dehydrocholecalciferol
(C) 0.025 μg of ergosterol
(D) 0.025 μg of ergocalciferol
Deficiency of vitamin D causes?
(A) Ricket and osteomalacia
(B) Tuberculosis of bone
(C) Hypthyroidism
(D) Skin cancer
Richest source of Vitamin D is?
(A) Fish liver oils
(B) Margarine
(C) Egg yolk
(D) Butter
A poor source of Vitamin D is?
(A) Egg
(B) Butter
(C) Milk
(D) Liver
The normal serum concentration of 24,25- dihydroxycholecalciferol in ng/ml is?
(A) 8–20
(B) 25–50
(C) 1–5
(D) 60–100
The normal serum concentration of 1,25- dihydroxycholecalciferol in pg/ml is?
(A) 26–65
(B) 1–5
(C) 5–20
(D) 80–100