Calcitriol is (A) 1-hydroxy cholecalciferol (B) 25-hydroxy cholecalciferol (C) 24, 25-dihydroxy cholecalciferol (D) 1, 25-dihydroxy cholecalciferol

1 Answer

Answer :

Answer : D

Related questions

Description : Calcitriol is (A) 1-OH-cholecalciferol (B) 25-OH-cholecalciferol (C) 24, 25-diOH cholecalciferol (D) 1, 25-diOH cholecalciferol

Last Answer : Answer : D

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 : 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

Last Answer : Answer : C

Description : Tubular reabsorption of calcium is increased by (A) Cholecalciferol (B) 25-Hydroxycholecalciferol (C) Calcitriol (D) All of these

Last Answer : Answer : C

Description : Hydroxylation of 25-hydroxy cholecalciferol is promoted by (A) Cytochrome A (B) Panthyroid hormone (C) Cytochrome b (D) cAMP

Last Answer : Answer : B

Description : Hydroxylation of 25-hydroxy cholecalciferol is promoted by (A) Cytochrome - a (B) Parathyroid hormone (C) Cytochrome-b (D) CAMP

Last Answer : Answer : B

Description : Catecholamine hormones are (A) 3, 4-Dihydroxy derivatives of phenylethylamine (B) p-Hydroxy derivatives of phenylacetate (C) p-Hydroxy derivatives of phenylpyruvate (D) p-Hydroxy derivatives of phenyllactate

Last Answer : Answer : A

Description : The most suitable vitamin D preparation for vitamin D dependent rickets is: A. Calciferol B. Cholecalciferol C. Calcifediol D. Calcitriol

Last Answer : D. Calcitriol

Description : The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is: (1) Amino phenyl alanine (2) Hydroxy phenyl alanine (3) Phenyl alanine (4) Dihydroxy phenyl alanine

Last Answer : (4) Dihydroxy phenyl alanine Explanation: The foot of the common mussel (Mytilus edulis) produces a sticky glue due to a unique compound called mussel adhesive protein, which contains a high ... be used as a tooth coating to prevent dental plaque, which is caused by bacterial infection.

Description : The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is: (1) Amino phenyl alanine (2) Hydroxy phenyl alanine (3) Phenyl alanine (4) Dihydroxy phenyl alanine

Last Answer :  Dihydroxy phenyl alanine

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

Last Answer : Answer : D

Description : A provitamin D synthesized in human beings is (A) Ergosterol (B) 7-Dehydrocholesterol (C) Cholecalciferol (D) 25-Hydroxycholecalciferol

Last Answer : Answer : B

Description : The structure shown below is of (A) Cholecalciferol (B) 25-Hydroxycholecalciferol (C) Ergocalciferol (D) 7-Dehydrocholesterol

Last Answer : Answer : A

Description : The reference compound for absolute configuration of optically active compound is (A) Alanine (B) Lactic acid (C) Glyceraldehyde (D) Dihydroxy acetone

Last Answer : Answer : C

Description : Which one of the following metabolites is not directly produced in the hexose monophosphate pathway? (A) Fructose-6-phosphate (B) Dihydroxy acetone phosphate (C) CO2 (D) Erythrose-4-phosphate

Last Answer : Answer : B

Description : 1-hydroxylation of 25-hydroxy Vitamin D3 takes place in (A) Liver (B) Kidneys (C) Intestine (D) Pancreas

Last Answer : Answer : B

Description : cis-acting elements include (A) Steroid hormones (B) Calcitriol (C) Histones (D) Silencers

Last Answer : Answer : D

Description : Women become susceptible to osteoporosis after menopause due to decreased (A) Secretion of Parathormone (B) Conversion of vitamin D into calcitriol (C) Secretion of estrogen (D) Secretion of progesterone

Last Answer : Answer : C

Description : Steroid hormones are synthesised from (A) Cholesterol (B) 7-Dehydrocholesterol (C) Calcitriol (D) 7-Hydroxycholesterol

Last Answer : Answer : A

Description : Hormone that bind to cell surface receptor and require the second messenger camp is (A) Antidiuretic hormone (B) Cholecystokinin (C) Calcitriol (D) Gastrin

Last Answer : Answer : A

Description : Calcitriol facilitates calcium absorption by increasing the synthesis of the following in intestinal mucosa: (A) Calcium Binding Protein (B) Alkaline Phosphatase (C) Calcium-dependent ATPase (D) All of these

Last Answer : Answer : D

Description : Calcitriol synthesis involves (A) Both liver and kidney (B) Intestine (C) Adipose tissue (D) Muscle

Last Answer : Answer : A

Description : A high plasma calcium level decreases intestinal absorption of calcium by (A) Stimulating the secretion of parathormone (B) Inhibiting the secretion of parathormone (C) Decreasing the synthesis of cholecalciferol (D) Inhibiting the secretion of thyrocalcitonin

Last Answer : Answer : B

Description : This is photo labile vitamin: (A) Thiamine (B) Riboflavin (C) Niacin (D) Cholecalciferol

Last Answer : Answer : B

Description : This is a photo-labile vitamin. (A) Thiamine (B) Riboflavin (C) Niacin (D) Cholecalciferol

Last Answer : Answer : C

Description : Dictary deficiency of this vitamin leads to night blindness: (A) Retinol (B) Niacin (C) Ascorbic acid (D) Cholecalciferol VITAMINS 125

Last Answer : Answer : A

Description : Provitamin D3 is (A) Cholecalciferol (B) Ergosterol (C) 7-Dehydrocholesterol (D) Ergocaliferol

Last Answer : Answer : C

Description : 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

Last Answer : Answer : C

Description : 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 VITAMINS 113

Last Answer : Answer : A

Description : A metabolite which is common to pathways of cholesterol biosynthesis from acetyl-CoA and cholecalciferol formation from cholesterol is (A) Zymosterol (B) Lumisterol (C) Ergosterol (D) 7 Dehydrocholesterol

Last Answer : Answer : D

Description : Following events occur in the cytoplasm and not inside storage vesicles, except (a) Conversion of tyrosine to dopa (b) Conversion of dopa to dopamine (c) Conversion of dopamine to norepinephrine (d) Conversion of dopamine to 3,4 dihydroxy phenyl acetic acid

Last Answer : Ans: C

Description : In the biosynthesis of testosterone the rate limiting step is conversion of (A) Cholesterol to pregnenolone (B) Pregnenolone to progesterone (C) Progesterone to 17 α-hydroxy progesterone (D) 17 α-Hydroxy progesterone to androstenedione

Last Answer : Answer : A

Description : Goitrogenic substance present in cabbage is (A) 5-vinyl-2 thio oxalzolidone (B) Pyridine-3-carboxylic acid (C) 3-Hydroxy-4, 5-dihydroxymethyl1–2-methyl pyridine (D) δ-ALA dehydratase

Last Answer : Answer : A

Description : Acetoacetyl-CoA condenses with one more molecule of acetyl-CoA to form (A) Mevalonate (B) Acetoacetate (C) β-Hydroxybutyrate (D) 3-Hydroxy 3-methyl-glutaryl-CoA

Last Answer : Answer : D

Description : The protein, which is in fact a multifunctional enzyme complex in higher organism is (A) Acetyl transacylase (B) Malonyl transacylase (C) 3-Hydroxy acyl-ACP dehyratase (D) Fatty acid synthase

Last Answer : Answer : D

Description : In the pathway leading to biosynthesis of acetoacetate from acetyl-CoA in liver, the immediate precursor of aceotacetate is (A) Acetoacetyl-CoA (B) 3-Hydroxybutyryl-CoA (C) 3-Hydroxy-3-methyl-glutaryl-CoA (D) 3-Hydroxybutyrate

Last Answer : Answer : A

Description : The synthesis of 3-hydroxy-3-methylglutaryl-CoA can occur (A) Only in mitochondria of all mammalian tissues (B) Only in the cytosol of all mammalian tissue (C) In both cytosol and mitochondria (D) In lysosomes

Last Answer : Answer : C

Description : The coenzyme involved in dehydrogenation of 3-hydroxy acyl-CoA is (A) FAD (B) FMN (C) NAD (D) NADP

Last Answer : Answer : C

Description : The formation of ∆2-trans-enoyl-CoA from acyl-CoA requires the enzyme: (A) Acyl-CoA synthetase (B) Acyl-CoA dehydrogenase (C) 3-Hydroxy acyl-CoA dehydrogenase (D) Thiolase

Last Answer : Answer : B

Description : Folic acid or folate consists of the (A) Base pteridine, p-amino benzoic acid and asparate (B) Base purine, p-amino benzoic acid and glutamate (C) Base pteridine, p-amino benzoic acid and glutamate (D) Base purine, p-hydroxy benzoic acid and glutamate

Last Answer : Answer : C

Description : Riboflavin is a coenzyme in the reaction catalysed by the enzyme (A) Acyl CoA synthetase (B) Acyl CoA dehydrogenase (C) β-Hydroxy acyl CoA (D) Enoyl CoA dehydrogenase

Last Answer : Answer : B

Description : Which of the following is a hydroxy fatty acid? (A) Oleic acid (B) Ricinoleic acid (C) Caproic acid (D) Stearic acid

Last Answer : Answer : B

Description : An example of a hydroxy fatty acid is (A) Ricinoleic acid (B) Crotonic acid (C) Butyric acid (D) Oleic acid

Last Answer : Answer : A

Description : RNA does not contain (A) Uracil (B) Adenine (C) Hydroxy methyl cytosine (D) Phosphate

Last Answer : Answer : C

Description : The amino acid containing hydroxy group: (A) Glycine (B) Isoleucine (C) Arginine (D) Thereonine

Last Answer : Answer : D

Description : Frequently employed materials for the adsorption chromatography of proteins include (A) High capacity supporting gel (B) Starch blocks (C) Calcium phosphate gel alumina gel and hydroxy apatite (D) All of these

Last Answer : Answer : C

Description : Optical isomers of all aminoacids exist except (A) Glycine (B) Arginine (C) Alanine (D) Hydroxy proline

Last Answer : Answer : A

Description : The first amino acid incorporated in a polypeptide in a ribosome of a human is (A) N formyl methionine (B) Methionine (C) Phenyl alanine (D) Hydroxy lysine

Last Answer : Answer : B

Description : One of the following has a phenolic group: (A) Histidine (B) Hydroxy lysine (C) Seratonine (D) Hydroxy proline

Last Answer : Answer : C

Description : Which among the following has an imidazole group? (A) Histidine (B) Tryptophan (C) Proline (D) Hydroxy proline

Last Answer : Answer : A