Description : The major catabolic product of pyrimidines in human is (A) β-Alanine (B) Urea (C) Uric acid (D) Guanine
Last Answer : Answer : A
Description : Which of the following statements about nucleic acid is most correct? (A) Both pentose nucleic acid and deoxypentose nucleic acid contain the same pyrimidines (B) Both pentose nucleic acid and deoxypentose ... (C) RNA contains cytosine and thymine (D) DNA and RNA are hydrolysed by weak alkali
Last Answer : Answer : B
Description : Glycine is not required for the formation of (A) Taurocholic acid (B) Creatine (C) Purines (D) Pyrimidines
Description : In humans, the principal metabolic product of pyrimidines is (A) Uric acid (B) Allantoin (C) Hypoxanthine (D) β-alanine
Last Answer : Answer : D
Description : In humans, the principal break down product of purines is (A) NH3 (B) Allantin (C) Alanine (D) Uric acid
Description : Nucleic acids can be detected by means of their absorption maxima near 260 nm. Their absorption in this range is due to (A) Proteins (B) Purines and pyrimidines (C) Ribose (D) Deoxyribose
Description : Methylated purines and pyrimidines are characteristically present in (A) mRNA (B) hnRNA (C) tRNA (D) rRNA
Last Answer : Answer : C
Description : Identify the correct molecule which controls the biosynthesis of proteins in living organisms. (A) DNA (B) RNA (C) Purines (D) Pyrimidines
Description : Free ammonia is released during (A) Oxidative deamination of glutamate (B) Catabolism of purines (C) Catabolism of pyrimidines (D) All of these
Description : The probable metabolic defect in gents is (A) A defect in excretion of uric acid by kidney (B) An overproduction of pyrimidines (C) An overproduction of uric acid (D) Rise in calcium leading to deposition of calcium urate
Description : Which pathway is correct for catabolism of purines to form uric acid? (A) Guanylate→Adenylate→Xanthine→hypoxanthine→Uric acid (B) Guanylate→inosinate→Xanthine→hypoxanthine→Uric acid (C) Adenylate→Inosinate→Xanthine hypoxanthine→Uric acid (D) Adenylate→Inosinate→hypoxanthine Xanthine→Uric acid
Description : In inherited deficiency of hypoxanthine guanine phosphoribosyl transferase (A) De novo synthesis of purine nucleotides is decreased (B) Salvage of purines is decreased (C) Salvage of purines is increased (D) Synthesis of uric acid is decreased
Description : All of the following statements about uric acid are true except (A) It is a catabolite of purines (B) It is excreted by the kidneys (C) It is undissociated at pH above 5.8 (D) It is less soluble than sodium urate
Description : .What is it that forms the basis of DNA finger-printing? (a) The relative proportions of purines and pyrimidines in DNA. (b) The relative difference in the DNA occurrence in blood, skin ... ridges and grooves of the fingerprints. (d) Satellite DNA occurring as highly repeated short DNA segments
Last Answer : Satellite DNA occurring as highly repeated short DNA segments
Description : Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it? (a) Guanine, Adenine - Purines (b) Adenine, Thymine - Purines (c) Thymine, Uracil - Pyrimidines (d) Uracil, Cytosine - Pyrimidines
Last Answer : (b) Adenine, Thymine - Purines
Description : Pick the right difference between a DNA and RNA a) Sugar and phosphate b) sugar and purines c) purines and phosphate d) sugar and pyrimidines
Last Answer : c) purines and phosphate
Description : Purines: a. include guanine b. are metabolized to uric acid c. are mainly synthesized in the liver d. all above
Last Answer : all above
Description : Uric acid is the end product of purine as well as protein catabolism in (A) Man (B) Fish (C) Birds (D) None of these
Description : The end product of purine catabolism in man is (A) Inosine (B) Hypoxanthine (C) Xanthine (D) Uric acid
Description : In humans end product of purine catabolism is (A) Uric acid (B) Urea (C) Allantoin (D) Xanthine
Description : The end product of amino acid nitrogen metabolism in uricotelic organisms (reptiles and birds) is (A) Bilirubin (B) Urea (C) Uric acid (D) Biliverdin
Description : The major end product of protein nitrogen metabolism in man is (A) Glycine (B) Uric acid (C) Urea (D) NH3
Description : Orotic aciduria can be controlled by (A) Oral administration of orotic acid (B) Decreasing the dietary intake of orotic acid (C) Decreasing the dietary intake of pyrimidines (D) Oral administration of uridine
Description : Most major metabolic pathways are considered mainly either anabolic or catabolic. Which of the following pathway is most correctly considered to be amphibolic? (A) Citric acid cycle (B) Gluconeogenesis (C) Lipolysis (D) Glycolysis
Description : Two nitrogen of the pyrimidines ring are obtained from (A) Glutamine and Carbamoyl-p (B) Asparate and Carbamoyl-p (C) Glutamate and NH3 (D) Glutamine and NH3
Description : A key substance in the committed step of pyrimidines biosynthesis is (A) Ribose-5-phosphate (B) Carbamoyl phosphate (C) ATP (D) Glutamine
Description : Most of the metabolic pathways are either anabolic or catabolic. Which of the following pathways is considered as “amphibolic” in nature? (A) Glycogenesis (B) Glycolytic pathway (C) Lipolysis (D) TCA cycle
Last Answer : D
Description : Infant i le convu ls ions due to lesser formation of gamma amino butyric acid from glutamic acid is seen in the deficiency of (A) Glutamate-dehydrogenase (B) Pyridoxine (C) Folic acid (D) Thiamin
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 : Vitamin deficiency that causes fatty liver includes all except (A) Vitamin E (B) Pyridoxine (C) Retionic acid (D) Pantothenic acid
Description : Coenzyme A contains the vitamin: (A) Riboflavin (B) Pantothenic acid (C) Pyridoxine (D) Thiamine
Description : In fatty acids synthase of both bacteria and mammals, ACP (acyl carrier protein) contain the vitamin: (A) Thiamin (B) Pyridoxine (C) Riboflavin (D) Pantothenic acid
Description : The enzyme -ketoglutarate dehydrogenase in the citric acid cycle requires (A) Lipoate (B) Folate (C) Pyridoxine (D) Inositol
Description : Increased carbohydrate consumption increases the dietary requirement for (A) Thiamine (B) Riboflavine (C) Pyridoxine (D) Folic acid
Description : Convulsive episodes occur when there is a severe deficiency of: (A) Pyridoxine (B) Folic acid (C) Thiamine (D) Riboflavin
Description : Convulsive episodes occur when there is a severe deficiency of (A) Pyridoxine (B) Folic acid (C) Thiamine (D) Riboflavin
Description : Anaemia can occur due to the deficiency of all the following except (A) Thiamin (B) Pyridoxine (C) Folic acid (D) Cyanocobalamin
Description : The vitamin having the highest daily requirement among the following is (A) Thiamin (B) Ribovflavin (C) Pyridoxine (D) Ascorbic acid
Description : Anti-egg white injury factor is (A) Pyridoxine (B) Biton (C) Thiamin (D) Liponic acid
Description : Pyridoxine deficiency can be diagnosed by measuring the urinary excretion of xanthurenic acid following a test dose of (A) Glycine (B) Histidine (C) Tryptophan (D) Pyridoxine
Description : Pyridoxine deficiency can be diagnosed by measuring urinary excretion of (A) Pyruvic acid (B) Oxaloacetic acid (C) Xanthurenic acid (D) None of these VITAMINS 119
Description : Vitamin required for metabolism of diols e.g. conversion of ethylene glycol to acetaldehyde is (A) Thiamin (B) Cobalamin (C) Pyridoxine (D) Folic acid
Description : ‘Burn ing foot syndrome’ has been ascribed to the deficiency of (A) Pantothenic acid (B) Thiamin (C) Cobalamin (D) Pyridoxine
Description : In the body 1 mg of niacin can be produced from (A) 60 mg of pyridoxine (B) 60 mg of tryptophan (C) 30 mg of tryptophan (D) 30 mg of pantothenic acid
Description : Pellagra is caused due to the deficiency of (A) Ascorbic acid (B) Pantothenic acid (C) Pyridoxine (D) Niacin
Description : The pellagra preventive factor is (A) Riboflavin (B) Pantothenic acid (C) Niacin (D) Pyridoxine
Description : Magenta tongue is found in the deficiency of the vitamin (A) Riboflavin (B) Thiamin (C) Nicotinic acid (D) Pyridoxine
Description : Neonatal tyrosinemia improves on administration of (A) Thiamin (B) Riboflavin (C) Pyridoxine (D) Ascorbic acid
Description : The four nitrogen atoms of purines are derived from (A) Urea and NH3 (B) NH3, Glycine and Glutamate (C) NH3, Asparate and Glutamate (D) Aspartate, Glutamine and Glycine