Description : The plasmid-mediated properties is/are A.fermentation of lactose B.production of enterotoxin C.resistance to antibiotics D.all of these
Last Answer : D.all of these
Description : The plasmid-mediated properties is/are A- fermentation of lactose B- production of enterotoxin C- resistance to antibiotics D- all of these
Last Answer : all of these
Description : Antibiotics and chemotherapeutic agents have been available to doctors since a. The Civil War. b. The days of the Roman physicians. c. 1965 d. The 1940s.
Last Answer : d. The 1940s.
Description : Antibiotics will not work against _____ diseases because they lack the structures and metabolic machinery with which antibiotics interfere. a. viral b. bacterial c. fungal d. protozoan
Last Answer : a. viral
Description : Which of the following antibiotics work by targetting protein synthesis? a. Methicillin b. Chloramphenicol c. Penicillin d. Nystatin.
Last Answer : b. Chloramphenicol
Description : New approaches to antibiotic therapy include a. Carbohydrate targets in the wall LPS. b. unregulating DNA replication. c. Discovering new and unique antibiotics. d. All of the above (A—C) are correct.
Last Answer : d. All of the above (A—C) are correct.
Description : A superinfection could arise from a. Using antibiotics when not needed. b. Using unnecessarily large doses of antibiotics. c. Stopping antibiotic treatment prematurely.. d. All of the above (A—C) are correct.
Last Answer : b. Using unnecessarily large doses of antibiotics.
Description : Antibiotics inhibiting nucleic acid synthesis include a. Rifampin and quinolones. b. Aminoglycosides and tetracyclines. c. Lincosamides and streptogramins. d. Macrolides and ami noglycosides.
Last Answer : a. Rifampin and quinolones.
Description : Two cyclic polypeptide antibiotics are a. Vancomycin and streptomycin. b. Penicillin and cephalosporin. c. Bacitracin and polymyxins d. .gentamicin and chloramphenicol
Last Answer : c. Bacitracin and polymyxins
Description : In the soil, antibiotics are produced by some a. Fungal species and viruses. b. Bacterial species and viruses. c. Viruses and helminthic species. d. Fungal and bacterial species.
Last Answer : d. Fungal and bacterial species.
Description : Organisms that normally inhabit the body a. include Treponema pallidum. b. cause endogenous diseases. c. may be detected by Donovan bodies. d. resist the effects of antibiotics.
Last Answer : b. cause endogenous diseases.
Description : What is the best treatment for cholera? a. Antibiotics b. Water c. Milk d. Oral Rehydration Therapy
Last Answer : d. Oral Rehydration Therapy
Description : Cases of Rheumatic heart disease have decreased in recent years because of _________. a. Use of Antibiotics for Strep. Throat b. A New Vaccine for Strep. Throat. c. The Vaccine for Pertussis. d. Better Hygiene.
Last Answer : a. Use of Antibiotics for Strep. Throat
Description : Excision repair would correct DNA damage caused by a. Antibiotics. b. UV Light. c. A Chemical Mutagen. d. A Dna Replication Error.
Last Answer : b. UV Light.
Description : When is ionizing radiation used to sterilize? a. To Sterilize Vitamins b. For Preserving Foods c. To Sterilize Hormones d. To Sterilize Antibiotics e. All The Above
Last Answer : e. All The Above
Description : Bacteria are most sensitive to antibiotics at which phase of growth curve A Lag phase B Log Phase C Stationary phase D Phase of Decline
Last Answer : B Log Phase
Description : A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called A.activation B.attenuation C.corepression D.desiccation
Last Answer : B.attenuation
Description : Negative regulation of protein synthesis is accomplished by A- allosteric inhibition B- the binding of RNA polymerase to the promoter C- the binding of a repressor to the DNA D- the binding of a repressor to the RNA polymerase
Last Answer : the binding of a repressor to the DNA
Description : Which one of the following statements is not true of RNA? a. RNA contains the monosaccharide ribose. b. RNA is primarily a single-stranded molecule. c. RNA has a sugar-phosphate backbone. d. RNA contains five different nucleotides.
Last Answer : d. RNA contains five different nucleotides.
Description : A molecule of ATP contains a. Ribose But No Adenine. b. Phosphate But No Ribose. c. Adenine But No Deoxyribose. d. Deoxyribose But No Thymine.
Last Answer : b. Phosphate But No Ribose.
Description : Which of the following organisms have shown the ability of phosphate solubilization in red wine? A.S.cerevisiae B.Gluconobacter oxydans C.Bacillus subtilis D.None of these
Last Answer : B.Gluconobacter oxydans
Description : In glycolysis, ATP is created by A.photophosphorylation B.the chemiosmotic mechanism C.substrate level phosphorylation D.the pentose phosphate pathway
Last Answer : C.substrate level phosphorylation
Description : When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called A.pentose phosphate pathway B.glycolyic pathway C.glyoxylate pathway D.oxaloacetate pathway
Last Answer : C.glyoxylate pathway
Description : Dolichol phosphate is A- a complex lipid involved in docking vesicles with the plasma membrane B- the anchor on which sugars assemble before transfer to proteins C- a chaperone used in protein folding D- a product of phospholipase C activation
Last Answer : the anchor on which sugars assemble before transfer to proteins
Description : Which one of the following is NOT part of an ATP MOLECULE? a. Phosphate group b. Cofactor c. Ribose d. Adenine
Last Answer : b. Cofactor
Description : A nucleic acid has a "backbone" consisting of _____. a. The nitrogenous bases. b. sugar-phosphate-sugar-phosphate-... c. N-C-N-C-N-C-N-C-... d. functional groups.
Last Answer : b. sugar-phosphate-sugar-phosphate-...
Description : Negative phase is observed in A- secondary humoral response B- primary humoral response C- both (a) and (b) D- none of the above
Last Answer : secondary humoral response
Description : Before bacterial cells are simple stained and observed with the light microscope, they must be a. Smeared on a slide. b. Heat fixed. c. Air dried. d. All the above (A—C) are correct.
Last Answer : d. All the above (A—C) are correct.
Description : Regulation of some enzymes by covalent modification involves addition or removal of (A) Acetate (B) Sulphate (C) Phosphate (D) Coenzyme
Last Answer : Answer : C
Description : Are alkaloids found in nature?
Last Answer : Need answer
Description : The number of N-MC groups in alkaloids is best estimate with the help of (A) HI (B) H2SO4 (C) (CH3CO)2 CO (D) CH3 Mg I
Last Answer : Answer : A
Description : Alkaloids are usually purified by extraction with (A) Ether (B) Dil HCl (C) NaOH (D) Chloroform
Last Answer : Answer : B
Description : Opium alkaloids are: (1) Codeine (2) Diethyllysergic acid (3) Morphine (4) Saffron
Last Answer : Ans. ((d))
Description : Very abundantly occurring plant products are (a) tannins (b) lignins (c) alkaloids (d) flavonoids
Last Answer : Ans:(b)
Description : Amino acids are required for the synthesis of – (1) Alkaloids (2) Lipids (3) Proteins (4) Carbohydrates
Last Answer : (3) Proteins Explanation: Amino acids are required for the synthesis of body protein and other important nitrogen-containing com-pounds. Amino acids are constituents of protein and act as precursors for ... be synthesized and which must then be acquired via the diet are referred to as essential.
Description : Aspartame is the name of a product used by diabetic patients as a sweetening agent. It belongs to the class of — (1) Carbohydrates (2) Peptides (3) Polyhydric alcohols (4) Alkaloids
Last Answer : (2) Peptides Explanation: Aspartame is an artificial, nonsaccharide sweetener used as a sugar substitute in some foods and beverages. It is a methyl ester of the aspartic acid/phenylalanine ... more severe conditions, the peptide bonds are also hydrolyzed, resulting in the free amino acids.
Description : Which of the following statements is incorrect? (a) Yeasts have filamentous bodies with long thread like hyphae. (b) Morels and truffles are edible delicacies. (c) Claviceps is a source of many alkaloids and LSD. (d) Conidia are produced exogenously and ascospores endogenously
Last Answer : (a) Yeasts have filamentous bodies with long thread like hyphae.
Description : Pick out the wrong statement. (A) Pasteurisation of milk involves moderate heating followed by cooling (B) Bakeries and breweries make use of yeasts (C) Enzyme is a complex nitrogenous compound (D) Oils and fats are alkaloids
Last Answer : (D) Oils and fats are alkaloids
Description : Tropane alkaloids are NOT present in (A) Datura stramonium (B) Erythroxylum coca (C) Duboisia myoporoides (D) Lobelia inflata
Last Answer : (D) Lobelia inflata
Description : Alkaloids are NOT precipitated by (A) Mayer's reagent (B) Dragendroff Reagent (C) Picric acid (D) Millon's reagent
Last Answer : (D) Millon's reagent
Description : Allelochemicals liberate through volatiliza tion a). Terpinoid b). Alkaloids c). Tannins d). Lactones
Last Answer : a). Terpinoid
Description : Root exudates of wheat and oats which has detrimental effects on wild mustard con tain a). Phenolic acid b). Alkaloids c). Sulphides d). Lactones
Last Answer : a). Phenolic acid
Description : Vinca alkaloids exert antitumor activity by: A. Activating topoisomerase II to cause breaks in DNA strands B. Crosslinking DNA strands C. Inhibiting DNA mediated RNA synthesis D. Inhibiting polymerization of tubulin to form intracellular microtubules
Last Answer : D. Inhibiting polymerization of tubulin to form intracellular microtubules
Description : The quarternary analogues of belladonna alkaloids are preferred over the natural alkaloids for antisecretory/ antispasmodic indications because: A. They have additional nicotinic receptor blocking activity B. They are ... of CNS and ocular effects D. Dose to dose they are more potent than atropine
Last Answer : C. They are devoid of CNS and ocular effects
Description : Explain the general chemical test for the identification of alkaloids
Last Answer : Identification tests for alkaloids by precipitation method: 1. Mayer's Reagent (Potassium mercuric iodide) Cream or pale yellow ppt. 2. Dragendorff's Reagent (Potassium bismuth iodide) Brown or ... ppt. 4. Hager's Reagent (Saturated solution of picric acid) Yellow ppt.
Description : Select the correct statement in relation to drug therapy of migraine: A. Simple analgesics like paracetamol are ineffective in migraine B. Ergot alkaloids are used for prophylaxis as well as treatment ... resistant cases D. Ergot alkaloids should be given till 24 hours after an attack has subsided
Last Answer : C. Use of ergot alkaloids is restricted to severe or resistant cases
Description : Name the alkaloids obtained from Capsicum fruitescence and Nicotiana tabacum.
Last Answer : Ans: Capsine from Capsicum and Nicotine from Nicotiana
Description : Amino acids are required for the synthesis of : (1) Alkaloids (2) Lipids (3) Proteins (4) Carbohydrates
Last Answer : Proteins