Description : Caffeine is more powerful than theophylline in exerting the following action (a) Bronchodilatation (b) Cardiac stimulation (c) Diuresis (d) Augmentation of skeletal muscle contractility
Last Answer : Ans: D
Description : Caffeine is more powerful than theophylline in exerting the following action: A. Bronchodilatation B. Cardiac stimulation C. Diuresis D. Augmentation of skeletal muscl contractility
Last Answer : D. Augmentation of skeletal muscl contractility
Description : In pernicious anemia, Urine contains high amounts of (A) Methyl malonic acid(B) FIGLU (C) VMA (D) 5 HIAA
Last Answer : Answer : A
Description : Which of the following does not favour the formation of large quantities of dilute urine? (a) Renin (b) Atrial-natriuretic factor (c) Alcohol (d) Caffeine
Last Answer : (a) Renin
Description : For such kind of diazo- coupling reaction the suitable substituents P and S are respectively:
Last Answer : For such kind of diazo- coupling reaction the suitable substituents P and S are respectively: A. `-NH_(2)` and `- ... C. `-NH_(2)` and `-NHCH_(3)` D.
Description : Which of the following substituents is an ortho and para director and ring deactivating? (a) –NH2 (b) –Cl (c) –OCH3 (d) –OH
Last Answer : –Cl
Description : Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane
Last Answer : cis-1,3-diethylcyclohexane
Description : Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this ... tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.
Last Answer : a more stable carbonium ion is generated.
Description : A synthetic nucleotide analogue, used in organ transplantation as a suppressor of immunologic rejection of grafts is (A) Theophylline (B) Cytarabine (C) 4-Hydroxypyrazolopyrimidine (D) 6-Mercaptopurine
Last Answer : Answer : D
Description : Which xanthine derivative has no function in asthma ? (a) Theophylline (b) Pentoxyphyllin (c) Enprofylin (d) None of the above
Last Answer : Ans: B
Description : A 10 year old child suffers from exercise induced asthma: Which is the most suitable first line drug for regular prophylactic therapy ? (a) Oral salbutamol (b) Oral theophylline (c) Inhaled sodium cromoglycate (d) Inhaled beclomethasone dipropionate
Last Answer : Ans: C
Description : The antiasthma drug which cannot be administered by inhalation is (a) Theophylline (b) Ipratropium bromide (c) Budesonide (d) Terbutaline
Last Answer : Ans: A
Description : Relatively higher dose of theophylline is required to attain therapeutics plasma concentration in (a) Smokers (b) Congestive heart failure patients (c) Those receiving erythromycin (d) Those receiving cimetidine
Description : In the emergency department, the preferred first-line therapy for asthma exacerbation is (a) Theophylline (b) A ß-agonist (c) A corticosteroid (d) Cromolyn sodium (e) An antihistamine
Description : Roxithromycin has the following advantages over erythromycin except (a) It is more effective in whooping cough (b) It causes less gastric irritation (c) It has longer plasma half-life (d) It is unlikely to precipitate theophylline toxicity
Description : A patient of bronchial asthma maintained on theophylline developed upper respiratory tract infection. Which antimicrobial if used can increase the risk of developing theophylline toxicity: A. Ampicillin B. Cephalexin C. Cotrimoxazole D. Erythromycin
Last Answer : D. Erythromycin
Description : The distinctive feature(s) of sparfloxacin compared to ciprofloxacin is/are: A. Enhanced activity against gram positive bacteria B. Lack of pharmacokinetic interaction with theophylline and warfarin C. Higher incidence of phototoxic reaction D. All of the above
Last Answer : D. All of the above
Description : Select the fluoroquinolone which has high oral bioavailability, longer elimination half-life and which does not inhibit metabolism of theophylline: A. Norfloxacin B. Pefloxacin C. Lomefloxacin D. Ciprofloxacin
Last Answer : C. Lomefloxacin
Description : The following drug is believed to improve microcirculation in peripheral vascular diseases by promoting RBC flexibility: A. Cyclandelate B. Theophylline C. Pentoxiphylline D. Nicotinic acid
Last Answer : C. Pentoxiphylline
Description : The hypoglycaemic action of sulfonylureas is likely to be attenuated by the concurrent use of: A. Hydrochlorothiazide B. Propranolol C. Theophylline D. Aspirin
Last Answer : A. Hydrochlorothiazide
Description : The following is a competitive type of enzyme inhibitor: A. Acetazolamide B. Disulfiram C. Physostigmine D. Theophylline
Last Answer : C. Physostigmine
Description : Select the drug that undergoes extensive first-pass metabolism in the liver: A. Phenobarbitone B. Propranolol C. Phenylbutazone D. Theophylline
Last Answer : B. Propranolol
Description : Select the most appropriate drug for regular prophylactic therapy in a 10 year old child who suffers from exercise induced asthma: A. Oral salbutamol B. Oral theophylline C. Inhaled sodium cromoglycate D. Inhaled salmeterol
Last Answer : C. Inhaled sodium cromoglycate
Description : Theophylline is believed to benefit asthma patients by exerting the following actions except: A. Bronchodilatation B. Augmentation of diaphragmatic contractility C. Reduced mediator release D. Inhibition of antigen: antibody reaction
Last Answer : D. Inhibition of antigen: antibody reaction
Description : Select the antiasthma drug which cannot be administered by inhalation: A. Theophylline B. Ipratropium bromide C. Budesonide D. Terbutaline
Last Answer : A. Theophylline
Description : Which of the following drugs inhibits theophylline metabolism and raises its plasma concentration: A. Phenytoin B. Ciprofloxacin C. Levofloxacin D. Rifampicin
Last Answer : B. Ciprofloxacin
Description : Relatively higher dose of theophylline is required to attain therapeutic plasma concentration in: A. Smokers B. Congestive heart failure patients C. Those receiving erythromycin D. Those receiving cimetidine
Last Answer : A. Smokers
Description : Choose the correct statement about theophylline: A. Its use in asthma has declined because of narrow safety margin B. Its dose needs to be reduced in smokers C. It acts by increasing the formation of cAMP D. Its plasma halflife is longer in children compared to that in adults
Last Answer : A. Its use in asthma has declined because of narrow safety margin
Description : The following antiasthma drug is not a bronchodilator: A. Ipratropium bromide B. Theophylline C. Formoterol D. Sodium cromoglycate
Last Answer : D. Sodium cromoglycate
Description : Allopurinol does not inhibit the metabolism of: A. 6-Mercaptopurine B. 6-Thioguanine C. Azathioprine D. Theophylline
Last Answer : B. 6-Thioguanine
Description : The level of free fatty acids in plasma is increased by (A) Insulin (B) Caffeine (C) Glucose (D) Niacin
Last Answer : Answer : B
Description : What is the action of caffeine?
Last Answer : It inhibits phospho diesterase, increases activity of hormone sensitive lipase, and so, prolongs the action of cyclic AMP. Thus, caffeine favours lipolysis.
Description : Do plants like caffeine?
Last Answer : It might keep them up a bit.
Description : Study the following statements: 1. Tea plants thrive best in alkaline soils with rainfall above 150 cm and temperature between 20 - 30°C 2. The most important stimulant both in tea and coffee is caffeine 3. Wine, a popular alcoholic drink ... true? (a) 1, 3, and 4 (b) 2 and 4 (c) 1 and 4 (d) Only 2
Last Answer : Ans:(a)
Description : Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their (a) nutritive value (b) growth response (c) defence action (d) effect on reproduction
Last Answer : (c) defence action
Description : All following are naturally occurring nucleotides except (A) Cyclic AMP (B) ATP (C) DNA (D) Inosine monophosphate
Last Answer : Answer : C
Description : Chain elongation of fatty acids occurring in mammalian liver takes place in which of the following subcellular fractions of the cell? (A) Nucleus (B) Ribosomes (C) Lysosomes (D) Microsomes
Description : Gangliosides are the glycolipids occurring in (A) Brain (B) Liver (C) Kidney (D) Muscle
Description : Naturally occurring amino acids have (A) L-Configuration (B) D-Configuration (C) DL-Configuration (D) None of these
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
Description : All proteins contain the (A) Same 20 amino acids (B) Different amino acids (C) 300 Amino acids occurring in nature (D) Only a few amino acids
Last Answer : (A) Same 20 amino acids
Description : The emergence of land plants is generally accepted as occurring during what period on the geologic time scale: w) Cretaceous x) Triassic y) Permian z) Silurian
Last Answer : ANSWER: Z -- SILURIAN
Description : Degeneracy of the genetic code denotes the existence of (A) Base triplets that do not code for any amino acids (B) Codons consisting of only two bases (C) Codons that include one or more of the unusual bases (D) Multiple codons for a single amino acid
Description : In DNA, genetic information is located in (A) Purine bases (B) Pyrimidine bases (C) Purine and pyrimidine bases (D) sugar
Description : The structural stability of the double helix of DNA is as cribbed largely to (A) Hydrogen bonding between adjacent purine bases (B) Hydrophobic bonding between staked purine and ... Hydrogen bonding between adjacent pyrimidine bases (E) Hydrogen bonding between purine and pyrimidine bases
Description : All of the following statements about post-transcriptional processing of tRNA are true except (A) Introns of some tRNA precursors are removed (B) CCA is added at 3′ end (C) 7-Methylguanosine triphosphate cap is added at 5′ end (D) Some bases are methylated
Description : Newly synthesized tRNA undergoes posttranscriptional modifications which include all the following except (A) Reduction in size (B) Methylation of some bases (C) Formation of pseudouridine (D) Addition of C-C-A terminus at 5’ end