Description : The following has cyanide: (A) Vitamin B12 (B) Adenyl cobamide (C) Benzimidazole cobamide (D) Methyl cobamide
Last Answer : Answer : A
Description : Reduction of D-ribonucleotides to Ddeoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimidazole cobamide (B) Thioredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate
Last Answer : Answer : B
Description : Cobamide coenzymes are (A) Vitamin B1 (B) Riboflavin (C) Pyridoxine (D) Vitamin B12
Last Answer : Answer : D
Description : Vitamin B12 forms coenzymes known as (A) Cobamide (B) Transcobalamin I (C) Transcobalamin II (D) Both (B) and (C)
Description : The central heavy metal cobalt of vitamin B12 is coordinately bound to (A) Cyanide group (B) Amino group (C) Carboxyl group (D) Sulphide group
Description : A biochemical indication of vitamin B12 deficiency can be obtained by measuring the urinary excretion of (A) Pyruvic acid (B) Malic acid (C) Methyl malonic acid (D) Urocanic acid
Last Answer : Answer : C
Description : Methyl malonic aciduria is seen in a deficiency of (A) Vitamin B6 (B) Folic acid (C) Thiamine (D) Vitamin B12
Description : Methyl malonic aciduria is seen in the deficiency of (A) Vitamin B6 (B) Folic acid (C) Thiamine (D) Vitamin B12
Description : Both folic acid and methyl cobalamin (vitamin B12) are required in (A) Deamination of serine (B) Deamination of threonine (C) Conversion of pyridoxal phosphate to pyridoxamine phosphate (D) Methylation of homocystein to methionine
Description : Tetra hydroglolate can be freed from N5 methyl tetrahydrofolate only by (A) Nor epinephrine (B) Ethanol amine (C) Nicotinamide (D) Vitamin B12
Description : Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12
Description : Ethyl alcohol is commonly made unfit for drinking by the addition of (a) potassium cyanide (b) methyl alcohol (c) chloroform (d) potassium chloride
Last Answer : Ans:(b)
Description : Minamata disease was caused due to – (1) Lead (2) Cyanide (3) Mercury (4) Methyl isocyanate
Last Answer : (3) Mercury Explanation: Mimamata disease in Japan was caused due to mercury.
Description : Which of the following does not give benzoic acid on hydrolysis? (1) phenyl cyanide (2) benzoyl chloride (3) benzyl chloride (4) methyl benzoate
Last Answer : (3) benzyl chloride Explanation: Hydrolysis is any chemical reaction in which a molecule of water ruptures one or more chemical bonds.
Description : Acetamide on heating with P2O5 gives : (a) Methylamine (b) Ethylamine (c) Methyl cyanide (d) None of these
Last Answer : Methyl cyanide
Description : Minamata disease was caused due to (1) Lead (2) Cyanide (3) Mercury (4) Methyl isocyanate
Last Answer : Mercury
Description : The Bhopal gas tragedy was caused by the gas (1) Methyl chloride (2) Methyl Iso Cyanide (3) Methyl Iso Cyanate (4) Methyl Cyanide
Last Answer : Methyl Iso Cyanate
Description : Which of the following coenzyme takes part in tissue respiration? (A) Coenzyme Q (B) Coenzyme A (C) NADP (D) Cobamide
Description : Reduction of D-ribonucleotides to D-deoxy ribonucleotides in prokaryotes requires (A) 5, 6 dimethyl benzimindazole cobamide (B) Thiredoxin (C) Tetra hydrobiopterin (D) Tetra hydrofolate VITAMINS 131
Description : Which of the following vitamins is the precurssor of CoA? (A) Riboflavin (B) Pantothenate (C) Thiamine (D) Cobamide
Description : The dopamine D2 receptor has the following feature: A. It is excitatory in nature B. It is negatively coupled to adenyl cyclase C. It is selectively blocked by bromocriptine D. It is not blocked by metoclopramide
Last Answer : B. It is negatively coupled to adenyl cyclase
Description : Calcium absorption is inferred by (A) Fatty acids (B) Amino acids (C) Vitamin D (D) Vitamin B12
Description : Cobalt is a constituent of (A) Folic acid (B) Vitamin B12 (C) Niacin (D) Biotin
Description : A hypochromic microcytic anaemia which increases Fe, store in the bone marrow may be (A) Folic acid responsive (B) Vitamin B12 responsive (C) Pyridoxine responsive (D) Vitamin C responsive
Description : A hypochromic necrocytic anaemia with increase Fe stores in the bone marrow may be (A) Folic acid responsive (B) Vitamin B12 responsive (C) Pyridoxine responsive (D) Vitamin C responsive
Description : Cobalt is essential component of (A) Vitamin B1 (B) Vitamin B6 (C) Vitamin B12 (D) All of these
Description : Cobalt forms an integral part of the vitamin: (A) B1 (B) B6 (C) B12 (D) Folate
Description : A hypochromic microcytic anemia with increased iron stores in the bone marrow may be (A) Iron responsive (B) Pyridoxine responsive (C) Vitamin B12 responsive (D) Folate responsive
Description : Cobamides contain a vitamin which is (A) Folic acid (B) Ascorbic acid (C) Pantothenic acid (D) Vitamin B12
Description : Vitamin necessary for CoA synthesis: (A) Pantothenic acid (B) Vitamin C (C) B6 (D) B12
Description : Vitamin essential for transamination is (A) B1 (B) B2 (C) B6 (D) B12
Description : Vitamin used in the treatment of homocystinuria is (A) B1 (B) B5 (C) B12 (D) B6
Description : Metal in Vitamin B12 is (A) Copper (B) Cobalt (C) Iron (D) Zinc
Description : Which of the following vitamin act as a respiratory catalyst? (A) B2 (B) Pyridoxine (C) B12 (D) C VITAMINS 133
Description : The vitamin required for carboxylation reaction is (A) Vitamin B2 (B) Vitamin B6 (C) Biotin (D) Vitamin B12
Description : The three vitamins which are specially required for proper nerve functions are (A) Thiamine, Niacin and Riboflavin (B) Thiamin, Folic acid, Choline (C) Thiamine, Riboflavin, Pantothenic acid (D) Thiamine, Pyridoxin, Vitamin B12
Description : Rice-polishings contain whcih of the following Vitamin? (A) Riboflavin (B) Niacin (C) Thiamine (D) Vitamin B12
Description : Intrinsic factor of castle is (A) Vitamin B12 (B) Glycoprotein (C) R-proteins (D) Sigma protein
Description : Extrinsic factor of castle is (A) Vitamin B12 (B) Glycoprotein (C) R-proteins (D) Sigma protein
Description : Vitamin B12 initially binds to the proteins known as (A) Transcobalamin I (B) R-proteins (C) Transcobalamin II (D) Intrinsic factor of castle
Description : Corrinoid coenzymes are coenzymes of (A) Vitamin B6 (B) Vitamin B12 (C) Vitamin B2 (D) Vitamin B1
Description : The human species can biosynthesize (A) Vitamin C (B) Vitamin B12 (C) Thiamine (D) Niacin
Description : A deficiency of vitamin B12 causes (A) Cheliosis (B) Beriberi (C) Pernicious anemia (D) Scurvy
Description : The three vitamins which are specially required for proper nerve functions are acid: (A) Thiamine, niacin and riboflavin (B) Thiamine, folic acid, choline (C) Thiamine, riboflavin, patothenic acid (D) Thiamine, pyridoxin, vitamin B12
Description : Rice polishings contain this vitamin: (A) Riboflavin (B) Niacin (C) Thiamine (D) Vitamin B12
Description : Intrinsic factor of castle is (A) Vitamin B12 (B) Glycoprotein (C) R-Proteins (D) Sigma protein
Description : Extrinsic factor of castle is (A) Vitamin B12 (B) Glycoprotein (C) R-Proteins (D) Sigma protein VITAMINS 127
Description : Vitamin B12 initially binds to the proteins known as (A) Transcobalamin I (B) R-Proteins (C) Transcobalamin II (D) Intrinsic factor of castle
Description : Corninoid coenzymes are coenzymes of (A) Vitamin B12 (B) Vitamin B6 (C) Vitamin B2 (D) Vitamin B1