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 : Uric acid is the catabolic end product of (A) Porphyrine (B) Purines (C) Pyrimidines (D) Pyridoxine
Last Answer : Answer : A
Description : In humans, NH3 is detoxified in liver as (A) Creatinine (B) Uric acid (C) Urea (D) Uronic acid
Last Answer : Answer : C
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
Last Answer : Answer : B
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 : The major catabolic product of pyrimidines in human is (A) β-Alanine (B) Urea (C) Uric acid (D) Guanine
Description : The major end product of protein nitrogen metabolism in man is (A) Glycine (B) Uric acid (C) Urea (D) NH3
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
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 : Along with CO2, NH3 and ATP, the amino acid that is needed in urea cycle is (A) Alanine (B) Isoleucine (C) Aspartate (D) Glycine
Description : In most mammals, except primates, uric acid is metabolized by (A) Oxidation to allantoin (B) Reduction to NH3 (C) Hydrolysis to allantoin (D) Hydrolysis to NH3
Description : When NH3 is perfused through a dog’s liver ______ is formed, while ______ is formed in the birds liver. (A) Urea, Uric acid (B) Urea, allantoin (C) Uric acid, creatinine (D) Uric acid, Urea
Description : Mechanism by which NH3 is removed from the kidneys is (A) Urea formation (B) Uric acid formation (C) Creatinine formation (D) None of these
Description : NH3 is removed from brain mainly by (A) Creatinine formation (B) Uric acid production (C) Urea formation (D) Glutamine formation
Description : NH3 is detoxified in brain chiefly as (A) Urea (B) Uric acid (C) Creatinine (D) Glutamine
Description : In humans end product of purine catabolism is (A) Uric acid (B) Urea (C) Allantoin (D) Xanthine
Description : The major source of NH3 produced by the kidney is (A) Leucine (B) Glycine (C) Alanine (D) Glutamine
Description : Two nitrogen atoms of Urea in the urea cycle come from (A) NH3 (B) One from NH3 and one from aspartate (C) One from NH3 and one from glutamate (D) One from NH3 and one from alanine
Description : After being counseled about lifestyle and dietary changes, the patient was started on atorvastatin. During his treatment with atorvastatin, it is important to routinely monitor serum concentrations of (a) ... Alanine and aspartate aminotransferase (c) Platelets (d) Red blood cells (e) Uric acid
Last Answer : Ans: D
Description : In humans purine are catabolised to uric acid due to lack of the enzyme: (A) Urease (B) Uricase (C) Xanthine oxidase (D) Guanase
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
Description : Glycine is not required for the formation of (A) Taurocholic acid (B) Creatine (C) Purines (D) Pyrimidines
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 : 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 : Select the correct statement with respect to locomotion in humans. (a) The vertebral column has 10 thoracic vertebrae. (b) The joint between adjacent vertebrae is a fibrous joint. (c) A ... osteoporosis in old people. (d) Accumulation of uric acid crystals in joints causes their inflammation
Last Answer : (d) Accumulation of uric acid crystals in joints causes their inflammation.
Description : Which of the following is the main nitrogenous waste in humans ? (1) Ammonia (2) Urea (3) Uric Acid (4) Ammonium Nitrate
Last Answer : 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 : All the following statements about primary gout are true except (A) Its inheritance is X-linked recessive (B) It can be due to increased activity of PRPP synthetase (C) It can be ... activity of hypoxanthine guanine phosphoribosyl transferase (D) De novo synthesis of purines is increased in it
Description : Dietary purines are catabolised in (A) Liver (B) Kidneys (C) Intesitnal mucosa (D) All of these
Description : The enzyme common to catabolism of all the purines is (A) Adenosine deaminase (B) Purine nucleoside phosphorylase (C) Guanase (D) None of these
Description : Methylated purines and pyrimidines are characteristically present in (A) mRNA (B) hnRNA (C) tRNA (D) rRNA
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 : Which of the following intermediates of metabolism can be both a precursor and a product of glucose? (A) Lactate (B) Pyruvate (C) Alanine (D) Acetyl-CoA
Description : That sulfonamides act by inhibiting folate synthesis in bacteria is supported by the following findings except: A. Paraaminobenzoic acid antagonises the action of sulfonamides B. Methionine antagonises ... . Bacteria that utilise folic acid taken up from the medium are insensitive to sulfonamides
Last Answer : B. Methionine antagonises the action of sulfonamides
Description : Thyroid hormones are synthesized by the iodination of the amino acid: (A) Glycine (B) Phenylalanine (C) Alanine (D) Tyrosine
Description : Corn and gliadin are low in (A) Lysine (B) Alanine (C) Glycine (D) Aspartic acid
Description : Soyabean proteins are rich in (A) Lysine (B) Alanine (C) Glcyine (D) Aspartic acid
Description : Which among the following is a nutritionally essential amino acid for man? (A) Alanine (B) Glycine (C) Tyrosine (D) Isoleucine
Description : Which among the following is an essential amino acid for man? (A) Alanine (B) Serine (C) Valine (D) Glutamic acid
Description : Sulphydryl group of coenzyme a is contributed by (A) β-Alanine (B) β-Aminoisobutyric acid (C) Methionine (D) Thioethanolamine
Description : Pantothenic acid contains an amino acid which is (A) Aspartic acid (B) Glutamic acid (C) β-Alanine (D) β-Aminoisobutyric acid
Description : Hippuric acid is formed from (A) Benzoic acid and alanine (B) Benzoic acid glycine (C) Glucuronic acid and alanine (D) Glucuronic acid and glycine
Description : The amino acid which synthesizes many hormornes: (A) Valine (B) Phenylalanine (C) Alanine (D) Histidine
Description : One of the following amino acid is solely ketogenic: (A) Lysine (B) Alanine (C) Valine (D) Glutamate
Description : 2-Amino 3-OH propanoic acid is (A) Glycine (B) Alanine (C) Valine (D) Serine
Description : In glutathione (a tripeptide) is present apart from Glutamic acid and cysteine: (A) Serine (B) Glycine (C) Leucine (D) Phenyl alanine
Description : The amino acid which has a pK near 4 and thus is negatively charged at pH 7 is (A) Alanine (B) Glutamic acid (C) Glutamine (D) Aspargine