Description : The following statements are true about imipenem except: A. It is a β-lactam antibiotic, but neither a penicillin nor a cephalosporin B. It is rapidly degraded in the kidney C. It is safe in epileptics D. It is always given in combination with cilastatin
Last Answer : C. It is safe in epileptics
Description : The β-lactam antibiotic(s) that prolong(s) bleeding time by altering surface receptors on platelets is/are: A. Carbenicillin B. Piperacillin C. Cefotaxime D. Both `A’ and `B’ are correct
Last Answer : A. Carbenicillin
Description : Methicillin resistant staphylococci do not respond to β-lactam antibiotics because: A. They produce a β-lactamase which destroys methicillin and related drugs B. They elaborate an amidase which destroys ... low affinity for β-lactam antibiotics D. They are less permeable to β-lactam antibiotics
Last Answer : C. They have acquired penicillin binding protein which has low affinity for β-lactam antibioti
Description : What is Nisin ?
Last Answer : : Nisin is one of the most widely used antibiotics in food preservation .
Description : To the present time, over _____ antibiotic substances have been described and approximately _____ such drugs are available to the medical practitioner. a. 10,000; 100 b. 8,000; 100 c. 6000; 300 d. 4,000; 400
Last Answer : b. 8,000; 100
Description : A paper disc or small cylinder containing antibiotic is used in the antibiotic sensitivity assay known as the a. Tube dilution method. b. Immunodiffusion method. c. Agar diffusion method. d. Passive detection method.
Last Answer : c. Agar diffusion method.
Description : Which one of the following pairs is incorrectly matched as to antibiotic and use? a. Penicillin-gram-positive bacteria b. Nystatin-fungi c. Tetracycline-viruses d. Griseofulvin-fungi
Last Answer : c. Tetracycline-viruses
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 : The phosphorylation of an antibiotic is an example of which mechanism of resistance? a. Target modification b. Reduced permeability c. Antibiotic inactivation d. Altered metabolic pathway
Last Answer : c. Antibiotic inactivation
Description : The is used to determine an antibiotic‘s minimal inhibitory concentration (NEC). a. Ames test b. tube dilution method c. agar disk diffusion method d. Kirby-Bauer test
Last Answer : b. tube dilution method
Description : The concentration of an antibiotic causing harm to the host is called a. Toxic dosage Level. b. Therapeutic dosage level. c. Minimal inhibitory concentration. d. Chemotherapeutic index.
Last Answer : a. Toxic dosage Level.
Description : The condition known as pseudomembranous colitis is associated with a. Excessive antibiotic use in the intestine. b. Invasion of the tissues by Streptococcus mutans. c. Swollen lymph nodes. d. The secondary stage of syphilis.
Last Answer : a. Excessive antibiotic use in the intestine.
Description : Transposons are of particular significance because they a. often contain genes for antibiotic resistance. b. inhibit the effects of overlapping genes. c. come in pairs and often are associated with viruses. d. regulate gene transcription in bacterial cells.
Last Answer : a. often contain genes for antibiotic resistance.
Description : The Ames test is an effective procedure for a. Identifying disease-causing bacterial species. b. Detecting potential human carcinogens. c. Determining if DNA replication has occurred. d. Detecting antibiotic resistance.
Last Answer : b. Detecting potential human carcinogens.
Description : The Ames test is used to a. Identify Potential Human Carcinogens. b. Discover Auxotrophic Mutants. c. Find Pathogenic Bacterial Species. d. Identify Antibiotic Resistant Mutants.
Last Answer : a. Identify Potential Human Carcinogens.
Description : Transposable genetic elements (transposons) a. Were First Discovered By Watson And Crick. b. Are Smaller Than Insertion Sequences. c. Are Examples Of Plasmids. d. May Have Information For Antibiotic Resistance.
Last Answer : d. May Have Information For Antibiotic Resistance.
Description : If an antibiotic binds to a 50S subunit, what cellular process will be inhibited? a. DNA replication b. Intron excision c. Translation d. Transcription
Last Answer : c. Translation
Description : Which of the following is not an aminoglycoside antibiotic? A.Streptomycin B.Neomycin C.Kanamycin D.Cephalosporin
Last Answer : D.Cephalosporin
Description : The main difference between a self-transmissible and a mobilizableplasmidis that the selftransmissible plasmid A- transfers both strands of the plasmid DNA B- carries genes encoding the mating apparatus C- transfers antibiotic resistance genes D- usually has a transposon inserted into it
Last Answer : carries genes encoding the mating apparatus
Description : A medium would involve the addition of the antibiotic methicillin to identify methicillin-resistant bacteria. a. differential b. selective c. thioglycollate d. VBNC
Last Answer : b. selective
Description : Plasmids a. Replicate with the bacterial chromosome. b. Contain essential growth information. c. May contain antibiotic resistance genes. d. Are as large as the bacterial chromosome.
Last Answer : c. May contain antibiotic resistance genes.
Description : The term antibiotic was coined by _________to refer to antimicrobial substances naturally derived from _______. a. Waksman; bacteria and fungi b. Domagk; other living organisms c. Fleming; fungi and bacteria d. Ehrlich; bacteria
Last Answer : c. Fleming; fungi and bacteria
Description : Which type of interferon is produced by T lymphocytes? A.α B.β C.γ D. and γ β
Last Answer : .γ
Description : The organism commonly used for the production of carotene is/ are β A- Phycomycesblakesleeanus B- Phycomycesblakesleeanus C- Blakesleatrispora D- all of these
Last Answer : all of these
Description : Pseudomonas aeruginosa forms a blue water soluble pigment called A-pyocyanin B- chlororaphin C- pyoverdin D-β-carotene
Last Answer : pyocyanin
Description : Royce Sachet is suitable indicator for _ _ _ _ _ _ _ _ A Formaldehyde B Β-propiolactone C Isopropyl alcohol D Ethylene oxide
Last Answer : D Ethylene oxide
Description : The following antibiotic(s) exert(s) a long postantibiotic effect: A. Fluoroquinolones B. β-lactams C. Aminoglycosides D. All of the above
Last Answer : D. All of the above
Description : Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following ... are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis
Last Answer : Answer: a, b, d Penicillins, cephalosporins, and monobactams possess a b-lactam ring of some type and act to bind bacterial division plate proteins, thus inhibiting cell wall ... act in different mechanisms to inhibit protein synthesis, therefore two agents in combination act synergistically
Description : Methicillin resistant staphylococci do not respond to ß-lactam antibiotics because (a) They produce a ß-lactamase which destroys methicillin and related drugs (b) They elaborate an amidase which destroys ... low affinity for ß-lactam antibiotics (d) They are less permeable to ß-lactam antibiotics
Last Answer : Ans: C
Description : The beta lactam antibiotics include the following: A. Cephalosporins B. Monobactams C. Carbapenems D. All of the above
Description : The substance most commonly used as a food preservative is (a) sodium bicarbonate (b) tartaric acid (c) acetic acid (d) benzoic acid
Last Answer : Ans:(d)
Description : Which one of the following is used as a food preservative? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate
Last Answer : (1) Sodium. benzoate Explanation: Sodium benzoate has the chemical formula. NaC6H5CO2, it is a widely used food preservative, with E number E211. It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid.
Description : Potassium metabisulphate is used as a food preservative for – (1) Squash (2) Tomato Ketchup (3) Fruit Juices (4) Pickles
Last Answer : (3) Fruit Juices Explanation: The potassium meta-bisuifite preservative is an additive that is commonly used for preserving all kinds of vegetables and fruit and, thus, increasing their longevity. ... longevity. It is also added to dried apples and dehydrated potatoes to preserve their edibility.
Description : The substance most commonly used as a food preservative is – (1) sodium carbonate (2) tartaric acid (3) acetic acid (4) sodium salt of benzoic acid
Last Answer : (4) sodium salt of benzoic acid Explanation: A preservative is a naturally occurring or synthetically produced substance that is added to products such as foods, pharmaceuticals, paints, biological ... can be antioxidants such as oxygen absorbers, which inhibit the oxidation of food constituents.
Description : 6 to 10% solution of acetic acid is used as a preservative for various food items. It is commonly known as?
Last Answer : Vinegar
Description : Which salt is used as Food preservative?
Last Answer : Sodium benzoate
Description : Vanillin is a type of (A) Anti-pyretic drug (B) Food preservative (C) Flavour (D) Dye
Last Answer : (C) Flavour
Description : Substance used Highly as a food preservative
Last Answer : Sodium salts of benzoic acids
Description : Potassium meta-bisulphite is used as a food preservative for (1) Squash (2) Tomato Ketchup (3) Fruit Juices (4) Pickles
Last Answer : Fruit Juices
Description : Which one of the following is used as a food preservative ? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate
Description : The substance most commonly used as a food preservative is (1) sodium carbonate (2) tartaric acid (3) acetic acid (4) sodium salt of benzoic acid
Last Answer : sodium salt of benzoic acid
Description : What is the preservative they routinely spray on fish displayed at the seafood counter?
Last Answer : I believe I heard it was diluted ammonia. Ick.
Description : Can all-purpose flour be used as a preservative on a slice of cheese?
Last Answer : um probably not
Description : Which one of the following is used as preservative for foodstuff? (1) Sodium Benzoate (2) Picric acid (3) Glycerine (4) Sodium Chloride
Last Answer : (1) Sodium Benzoate Explanation: Sodium benzoate is a preservative. It is bacteriostatic and fungistatic under acidic conditions. It is most widely used in acidic foods such as salad dressings (vinegar), ... (vinegar), and condiments. It is also used as a preservative in medicines and cosmetics.
Description : Malathion is a/an - (1) insecticide (2) fumigant (3) preservative (4) pesticide
Last Answer : (1) insecticide Explanation: Malathion is an organophosphate (OP) insecticide that has been registered for use in the United States since 1956. It is widely used in agriculture, residential ... health pest control programs such as mosquito eradication. It is of relatively low human toxicity.
Description : The permanent preservative, which is used for preservation of fruit and vegetables, is— (A) Sodium chloride (B) Potassium metabisulphate (C) Potassium sulphate (D) Sugar
Last Answer : (B) Potassium metabisulphate
Description : The wooden poles well impregnated with creosite oil or any preservative compound have life (a) from 2 to 5 years (b) 10 to 15 years (c) 25 to 30 years (d) 60 to 70 years
Last Answer : (c) 25 to 30 years
Description : HCI in stomach act as (a) Antiseptic (b) Preservative (c) Make the media acidic (d) All the above
Last Answer : (d) All the above
Description : Ethylene diamine tetraacetoacetate (pron: te-tra-a-see-tow-AS-e-tate) (EDTW) is often used for which of the following: w) Determine hardness of water x) Measure the amount of zinc in a solution. y) A preservative in foods z) All of the above
Last Answer : ANSWER: Z -- ALL OF THE ABOVE