Description : Pralidoxime can reactivate cholinesterase enzyme that has been inactivated by: A. Carbamate anticholinesterases B. Organophosphate anticholinesterases C. Both carbamate and organophosphate anticholinesterases D. Reversible anticholinesterases
Last Answer : B. Organophosphate anticholinesterases
Description : Which is the most important drug in the treatment of organophosphate poisoning: A. Atropine sulfate B. Pralidoxime C. Diazepam D. Adrenaline
Last Answer : A. Atropine sulfate
Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body
Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules
Description : Out of two anticholinesterases, drug X' is a tertiary amine while drug Y' is a quarternary ammonium compound. Then: A. Drug X' is likely to be more potent than Y' B. Drug X' will be more ... a miotic C. Drug Y' will be completely metabolized in the body D. Drug Y' will produce CNS effects
Last Answer : B. Drug ‘X’ will be more suitable to be used as a miotic
Description : After chronic systemic therapy, withdrawal of corticosteroids should be gradual because: A. Corticosteroids produce psychological dependence B. Abrupt withdrawal may reactivate the underlying disease C. Abrupt withdrawal produces rebound hypertension D. All of the above are correct
Last Answer : B. Abrupt withdrawal may reactivate the underlying disea
Description : Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an __________ reaction. (A) Catalytic (B) Exothermic (C) Endothermic (D) Reversible
Last Answer : (B) Exothermic
Description : Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction. (A) Reversible (B) Catalytic (C) Exothermic (D) Endothermic
Last Answer : (D) Endothermic
Description : Bisphosphonates are indicated in the following condition: A. Organophosphate poisoning B. Dementia C. Steven’s Johnson syndrome D. Osteoporosis
Last Answer : D. Osteoporosis
Description : What are Killed (inactivated) vaccines?
Last Answer : When safe live vaccines are not available, either because attenuated strains have not been developed or else because reversion to wild type occurs too readily, it may be possible to use an ... site. However, the same disadvantages of poor immunogenicity and the need for multiple boosters apply.
Description : Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive ... inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity
Last Answer : B. Only anaerobes reduce it to generate the reactive nitro radical
Description : Compared to older tetracyclines, doxycycline produces a lower incidence of superinfection diarrhoea because: A. It is completely absorbed in the small intestines so that drug concentration in the colonic contents ... the microbes of the normal gut flora D. It is a potent tetracycline and inhibits
Last Answer : A. It is completely absorbed in the small intestines so that drug concentration in the colonic contents is low
Description : yocardial Na+ channel blockade by lignocaine has the following characteristic: A. It blocks inactivated Na+ channels more than activated channels B. It blocks activated Na+ channels more than inactivated ... Na+ channels D. It produces more prominent blockade of atrial than ventricular Na+ channels
Last Answer : A. It blocks inactivated Na+ channels more than activated channels
Description : Following enzyme is involved in the synthesis of actylcholine (a) Choline acetyl transferase (b) Acetyl cholinesterase (c) Both (a) and (b) (d) None of the above
Last Answer : Ans: A
Description : Platelets contain an enzyme which has important role in clotting in blood. This enzyme is known as (A) Cholinesterase (B) Transaminase (C) Decarboxylase (D) Thrombokinase
Last Answer : Answer : D
Description : Reactivation of cholinesterase enzyme occurs on hydrolysis of the inhibitor by the same enzyme molecule in case of the following anticholinesterase: A. Edrophonium B. Neostigmine C. Dyflos D. Tacrine
Last Answer : B. Neostigmine
Description : The following inhibitor binds only to the ani-onic site of the cholinesterase enzyme: A. Neostigmine B. Physostigmine C. Edrophonium D. Dyflos
Last Answer : C. Edrophonium
Description : Zymogen is (A) An intracellular enzyme (B) Serum enzyme (C) A complete extracellular enzyme (D) An inactivated enzyme
Description : If by radiation all nitrogenase enzyme are inactivated, then there will be no (a) fixation of nitrogen in legumes (b) fixation of atmospheric nitrogen (c) conversion from nitrate to nitrite in legumes (d) conversion from ammonium to nitrate in soil.
Last Answer : (a) fixation of nitrogen in legumes
Description : Below freezing point an enzyme is (a) Inactivated (b) Activated (c) Destroyed (d) Unaffected
Last Answer : (a) Inactivated
Description : Choose the correct statement about moclobemide: A. It is a reversible inhibitor of MAO-A with short duration of action B. Patients taking it need to be cautioned not to consume tyramine rich food C. It is contraindicated in elderly patients D. It produces anticholinergic side effect
Last Answer : A. It is a reversible inhibitor of MAO-A with short duration of action
Description : The following is a reversible and selective MAO-A inhibitor: A. Bupropion B. Entacapone C. Moclobemide D. Selegiline
Last Answer : C. Moclobemide
Description : n the treatment of hyperthyroidism, carbimazole has the following advantage over radioactive iodine: A. Cost of treatment is lower B. It is preferable in uncooperative patient C. It is better tolerated by the patients D. Hypothyroidism when induced is reversible
Last Answer : Hypothyroidism when induced is reversible
Description : Can a hacker reactivate your Facebook account?
Last Answer : If “hackers” actually do anything more than serve as a scapegoat for media technophobia, I’d imagine that they certainly have better things to do with their time than reactivate old Facebook accounts.
Description : How Reactivate my I am account?
Last Answer : How to restore an imvu account
Description : Broad spectrum anthelmintics include D A. Benzimidazoles B. Triclabendazole C. Organophosphate D. Both a and b
Last Answer : Both a and b
Description : Herbicides of which group are generally incorporated in soil? a). Carbamate b). Dinitroaniline c). Triazine d). Both a and b
Last Answer : d). Both a and b
Description : Anti-cestodal drugs include A A. Niclosamide B. Organophosphate C. Levamisole D. None
Last Answer : Niclosamide
Description : Narrow spectrum anthelmintics include D A. Organophosphate B. Triclabendazole C. Benzimidazole D. None
Last Answer : None
Description : Biological control component is central to advanced agricultural production. Which of the following is used as a third generation pesticide? (a) Insect repellants (b) Organophosphate and carbamates (c) Pathogens (d) Pheromones
Last Answer : (d) Pheromones
Description : First bioinsecticide developed commercial scale was (a) quinine (b) DDT (c) organophosphate (d) sporeine
Last Answer : (d) sporeine
Description : Organophosphate group insecticide example is a. Endosulphan b. Sulpher c. Carbofuran d. All of these
Last Answer : c. Carbofuran
Description : Leishmania donovani is susceptible to certain antifungal drugs because both fungi and Leishmania: A. Utilise purine salvage pathway B. Utilise similar glycolytic mechanisms C. Have similar topoisomerase II enzyme D. Have ergosterol in their cell membranes
Last Answer : D. Have ergosterol in their cell membranes
Description : The high virus selectivity of acyclovir is due to: A. Its preferential uptake by virus infected cells B. Need of virus specific enzyme for its conversion to the active metabolite C. Its action on ... reverse transcriptase which does not occur in noninfected cells D. Both A' and B' are correct
Last Answer : D. Both ‘A’ and ‘B’ are correct
Description : Indicate the enzyme(s) inhibited by fluoroquinolones: A. Both 'A' and 'C' B. Topoisomerase II C. Topoisomerase IV D. DNA gyrase
Last Answer : D. DNA gyrase
Description : __________ is the undesirable by-product produced in the manufacture of urea. (A) Ammonium carbonate (B) Biuret (C) Carbon dioxide (D) Ammonium carbamate
Last Answer : (B) Biuret
Description : Dehydration of ammonium carbamate to yield urea is a/an __________ reaction. (A) Exothermic (B) Endothermic (C) Autocatalytic (D) Catalytic
Last Answer : (B) Endothermic
Description : Pick out the wrong statement. (A) Dehydration of ammonium carbamate to produce urea is endothermic (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India ... manufacture of ortho-phosphoric acid (D) Phosphate rock when reacted with dilute H2SO4 produces superphosphate
Last Answer : (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
Description : Dehydration of ammonium carbamate produces (A) Urea (B) Biuret (C) Ammonia water (D) None of these
Last Answer : (A) Urea
Description : In the manufacture of urea, the intermediate chemical formed is (A) Biuret (B) Ammonium carbamate (C) Ammonium carbonate (D) None of these
Last Answer : (B) Ammonium carbamat
Description : During conversion of ammonium carbamate into urea, presence of large excess of water (A) Increases the yield of urea (B) Adversely affects the yield of urea (C) Reduces the evaporator load by diluting the urea solution (D) Does not affect the yield of urea
Last Answer : (B) Adversely affects the yield of urea
Description : With increases in pressure, the conversion of Ammonium carbamate into urea (A) Increases (B) Decreases (C) Remains unaltered (D) Can either increase or decrease depends on biuret content
Last Answer : (A) Increases
Description : Besides NA and R 25788, other safeners to counteract the effect of carbamate herbi cide is a). CGA 43089 b). CGA 92194 c). Mon 4606 d). All of these
Last Answer : d). All of these
Description : Which herbicide group is photosynthesis inhibitor? a). Nitriles b). Carbamate c). Dicarboxylic acid d). Dinitroanilines
Last Answer : a). Nitriles