Description : The most potent Vitamin D metabolite is (A) 25-Hydroxycholecalciferol (B) 1,25-Dihydroxycholecalciferol (C) 24, 25-Dihydroxycholecalciferol (D) 7-Dehydrocholesterol
Last Answer : Answer : B
Last Answer : (B) 1,25-Dihydroxycholecalciferol
Description : Calcitriol inhibits the conversion of (A) Cholesterol into 7-dehydrocholesterol (B) Cholecalciferol into 1-hydroxycholecalciferol (C) Cholecalciferol into 25-hydroxycholecalciferol (D) 25-Hydroxycholecalciferol into 1,25- dihydroxycholecalciferol
Last Answer : Answer : D
Description : The normal serum concentration of 24,25- dihydroxycholecalciferol in ng/ml is (A) 8–20 (B) 25–50 (C) 1–5 (D) 60–100
Last Answer : Answer : C
Description : The normal serum concentration of 1,25- dihydroxycholecalciferol in pg/ml is (A) 26–65 (B) 1–5 (C) 5–20 (D) 80–100
Last Answer : Answer : A
Description : Parathormone is required for the conversion of (A) Cholecalciferol into 1-hydroxycholecalciferol (B) Cholecalciferol into 25-hydroxycholecalciferol (C) 25-Hydroxycholecalciferol into calcitriol (D) Cholesterol into 7-dehydrocholesterol
Description : Tubular reabsorption of calcium is increased by (A) Cholecalciferol (B) 25-Hydroxycholecalciferol (C) Calcitriol (D) All of these
Description : A provitamin D synthesized in human beings is (A) Ergosterol (B) 7-Dehydrocholesterol (C) Cholecalciferol (D) 25-Hydroxycholecalciferol
Description : The normal serum concentration of 25-hydroxycholecalciferol in ng/ml is (A) 0–8 (B) 60–100 (C) 100–150 (D) 8–55
Description : The structure shown below is of (A) Cholecalciferol (B) 25-Hydroxycholecalciferol (C) Ergocalciferol (D) 7-Dehydrocholesterol
Description : All the following vitamins give rise to cofactors that are phosphorylated in the active form except (A) Vitamin A (B) Vitamin B1 (C) Vitamin D (D) Vitamin E
Description : The active transport of ‘Ca’ is regulated by __________ which is synthesized in kidnyes. (A) Cholecalciferol (B) Ergosterol (C) 25-OH cholecalciferol (D) 1, 25-di OH-Cholecalciferol
Description : In renal rickets, the following hydroxylation of Vitamin D3 does not take place: (A) 25 (B) 1 (C) 24 (D) 7
Description : 25-hydroxylation of Vitamin D3 takes place in (A) Liver (B) Kidneys (C) Intestines (D) Pancreas
Description : 1-hydroxylation of 25-hydroxy Vitamin D3 takes place in (A) Liver (B) Kidneys (C) Intestine (D) Pancreas
Description : In retinal rickets, the following hydroxylation of Vitamin D3 does not take place: (A) 25 (B) 1 (C) 24 (D) 7
Description : 25-hydroxylation of vitamin D3 takes place in (A) Liver (B) Kidneys (C) Intestine (D) Pancreas
Description : 1-hydroxylation of 25-OH vitamin D3 takes place in (A) Liver (B) Kidneys (C) Intestine (D) Pancreas
Description : 25-Hydroxylation of vitamin D occurs in (A) Skin (B) Liver (C) Kidneys (D) Intestinal mucosa
Description : Daily requirement of vitamin C in adults is about (A) 100 mg (B) 25 mg (C) 70 mg (D) 100 mg
Description : The following are true about calcium regulating hormones: a. calcitonin increases the plasma calcium concentration b. vitamin D is produced in the skin c. vitamin D is metabolized to its active form in the liver and kidney. d. vitamin D increases calcium absorption from the gut
Last Answer : vitamin D increases calcium absorption from the gut
Description : Tranta's spots are noticed in cases of: a. Active trachoma b. Bulbar spring catarrh c. Corneal phlycten d. Vitamin A deficiency
Last Answer : ANSWER: B
Description : In citrus 80-90% of the active roots are present in the soil to a depth of: a. 25 cm b. 50 cm c. 75 cm d. 100 cm
Last Answer : 25 cm
Description : A spring with 25 active coils cannot be accommodated within a given space. Hence 5 coils of the spring are cut. The stiffness of the new spring will be a. the same b. 1.25 times the original spring c. 0.8 times the original spring d. 20 times the original spring
Last Answer : b. 1.25 times the original spring
Description : The physiologically active form of calcium is (A) Protein bond (B) Ionised (C) Complexed with citrate (D) Complexed with carbonate
Description : All the following statements about acetyl CoA carboxylase are true except (A) It is required for de novo synthesis of fatty acids (B) It is required for mitochondrial elongation of fatty acids ( ... for microsomal elongation of fatty acids (D) Insulin converts its inactive form into its active form
Description : All the following statements about angiotensin are true except (A) Its precursor is an α2-globulin (B) Its active form is an octapeptide (C) It is a vasodilator (D) It increases the secretion of aldosterone
Description : Pentagastrin is a (A) Naturally occurring form of gastrin (B) Inactive metabolite of gastrin (C) Active metabolite of gastrin (D) Synthetic form of gastrin