Description : Which of the following is a cephalosporin? A.Cephalosporin N B.Synnematin C.Cephalosporin C D.All of these
Last Answer : .All of these
Description : Bacitracin, Polymyxin and Neomycin are used together for topical skin infections under the name of _____. a. Neosporin b. Vancomycin c. Cephalosporin d. Nystatin.
Last Answer : a. Neosporin
Description : Two major drawbacks to the use of ______ is allergies and beta- lactamases produced by resistant bacteria. a. Tetracycline b. Penicillin c. Cephalosporin d. Bacitracin
Last Answer : b. Penicillin
Description : Two drugs that affect cell wall synthesis are a. Erythromycin and penicillin. b. Vancomycin and cephalosporin. c. Tetracycline and polymyxin b. d. Chloramphenicol and streptomycin.
Last Answer : a. Erythromycin and penicillin.
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 : Which of the following is not an aminoglycoside antibiotic? A.Streptomycin B.Neomycin C.Kanamycin D.Cephalosporin
Last Answer : D.Cephalosporin
Description : Select the fourth generation cephalosporin among the following (a) Cefpirome (b) Ceftizoxime (c) Ceftazidime (d) Cefuroxime
Last Answer : Ans: A
Description : Cefotaxime has the following properties except (a) It is highly active against aerobic gram negative bacteria (b) It is the most active cephalosporin against Pseudomonas aeruginosa (c) It produces an active metabolite (d) It has achieved high cure rates in serious hospital acquired infections
Last Answer : Ans: B
Description : Which one of the following statements about cefotetan is accurate? (a) It is active against MRSA strains (b) It is the drug of choice in community-acquired pneumonia (c) ... fourth-generation cephalosporin (d) It decreases prothrombin time (e) Its antibacterial spectrum include Bacteroides fragilis
Last Answer : Ans: E
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 : What is true of cefpirome: A. It is a fourth generation cephalosporin B. It easily penetrates porin channels of gram negative bacteria C. It inhibits type I β-lactamase producing enterobacteriaceae D. All of the above
Last Answer : . All of the above
Description : Choose the correct statement(s) about cefepime: A. It is a 4th generation cephalosporin B. It is active against many bacteria resistant to 3rd generation celphalosporins C. It is active by the oral route D. Both 'A' and 'B' are correct
Last Answer : D. Both 'A' and 'B' are correct
Description : Select the fourth generation cephalosporin among the following: A. Cefpirome B. Ceftizoxime C. Ceftazidime D. Cefuroxime
Last Answer : A. Cefpirome
Description : Select the 3rd generation cephalosporin that can be used only by parenteral route: A. Cefpodoxime proxetil B. Ceftizoxime C. Ceftibuten D. Cefixime
Last Answer : B. Ceftizoxime
Description : Cefotaxime has the following properties except: A. It is highly active against aerobic gram negative bacteria B. It is the most active cephalosporin against Pseudomonas aeruginosa C. It produces an active metabolite D. It has achieved high cure rates in serious hospital acquired infections
Last Answer : B. It is the most active cephalosporin against Pseudomonas aeruginosa
Description : Acute bacterial meningitis can begin with ____ that develops into a blood infection that then invades the meninges. a. N. meningitidis b. S. pneumoniae c. H. influenzae d. A-C are correct
Last Answer : d. A-C are correct
Description : A characteristic of protein synthesis in both the archaea and eukarya is A.transcription and translation are coupled B.translation is inhibited by diphtheria toxin C.proteins are synthesized from D-, ... L-, isomers of amino acids D.the initiator tRNA is charged with N-formyl- methionine
Last Answer : C.proteins are synthesized from
Description : n the time since E. coli and Salmonella diverged evolutionarily A.there has been little change in either genome B.E. coli has acquired many genes via horizontal transfer C.E, coli has lost approximately 50% of its genome D.none of these
Last Answer : C.E, coli has lost approximately 50% of its genome
Description : n Widal test the significant titres for H agglutinins is A- 1:50 or more B- 1:100 ormore C- 1:200 or more D- 1:400 or more
Last Answer : 1:200 or more
Description : During amino acid activation a(n) A-amino acid is bound to tRNA B- amino acid is bound to mRNA C-methyl group is attached to rRNA D-methyl group is attached to an amino acid
Last Answer : amino acid is bound to tRNA
Description : Which of the following modified amino acid is used at the starting of most prokaryotic proteins? A- N-formylserine B- -formylmethionine C- N-formylleucine D-.N-formylalanine
Last Answer : formylmethionine
Description : n lysogeny, A- a bacteriophage transfers bacterial DNA B- bacteria take up double stranded DNA from the environment C- DNA-degrading enzymes in the extracellular medium would stop the process D- a bacteriophage genome is integrated into the bacterial genome
Last Answer : a bacteriophage genome is integrated into the bacterial genome
Description : Peptidoglycan is also known as A- N-acetyl muramic acid B- mureinmucopeptide C- N acetylglucosamine D- mesodiaminopimetic acid
Last Answer : mureinmucopeptide
Description : Archeal cells usually do not contain peptidoglycan, rather contain pseudo- peptidoglycanwhichis mainly composed of A-.N-acetylmuramic acid and L-amino acids B-.N-acetylmuramic acid and D-amino acids C-.N-acetyltalosaminuronic acid and D-amino acids D-N-acetyltalosaminuronic acid and L-amino acids
Last Answer : N-acetyltalosaminuronic acid and L-amino acids
Description : A characteristic of protein synthesis in both the archaea and eukarya is A- transcription and translation are coupled B- translation is inhibited by diphtheria toxin C- .proteins are synthesized from D-, rather than L-, isomers of amino acids D- the initiator tRNA is charged with N-formyl-methionine
Last Answer : .proteins are synthesized from D-, rather than L-, isomers of amino acids
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 : Why is tetanus considered a disease of the nervous system?
Last Answer : Tetanus is a disease caused by a Gram- positive, spore- forming anaerobic rod called Clostridium tetani.This organism often exists in the spore form in the human and animal intestine and passes to ... Since the primary effect is in the nervous system, tetanus is considered a disease of this system.
Description : How is the Gram stain procedure performed in the microbiology laboratory?
Last Answer : In the laboratory, a heat- fixed smear of bacteria is stained with crystal violet for one minute. Then, iodine,which acts as a mordant, is added to the smear for one minute, and the remainder ... the stains are examined under the microscope and the color of the bacteria reveals the Gram reaction.
Description : What is the advantage of the attenuated viruses in a vaccine?
Last Answer : Attenuated viruses can be taken orally because they will survive passage into the gastrointestinal tract and will be absorbed into the blood stream. The method of administration is therefore easier than by ... this reason they may be advantageous when an epidemic is taking place or is anticipated.
Description : Why is microbial control necessary and what are some of the factors that go into the choice of a particular antimicrobial agent?
Last Answer : The control of microorganisms is an important way of preventing pathogens from reaching the body.Sterilizing laboratory equipment, hospital supplies, and industrial apparatus helps contain contamination.The choice of a ... , the acidity or alkalinity of the area, and the presence of organic matter.
Description : Which bacterium is responsible for tuberculosis, and what are the characteristics of the organism?
Last Answer : Tuberculosis is caused by a slender rod known as Mycobacterium tuberculosis. This slow- growing rod is neither Gram- positive nor Gram- negative; rather, it is acid- fast. When stained with ... fast characteristic is due to the presence of a very thick cell wall containing mycolic acid.
Description : Do all bacteria require oxygen for growth?
Last Answer : Many bacteria are aerobic; that is, they require oxygen to grow and perform the biochemical reactions of their metabolism. There are, however, a large number of bacterial species that are ... obligate anaerobes, while others are facultative anaerobes, meaning that they live with or without oxygen.
Description : Which microorganisms are involved in the pickling process in food production?
Last Answer : In the pickling process, microorganisms grow and ferment the food in a salty environment while producing large amounts of acid from available carbohydrates. Species of Leuconostoc and Lactobacillus are ... . Different spices are added to prepare various forms of sauerkraut and pickled cucumbers.
Description : How do microorganisms influence the carbon cycle on Earth?
Last Answer : Most of the organic matter present in soil originates in plant material from leaves, rotting trees, decaying roots, and other tissues. In the carbon cycle, soil bacteria and fungi recycle ... suffer an irreversible decline as the nutrients essential for life became tied up in complex molecules.
Description : Are bacteria able to move, and, if so, how?
Last Answer : Bacteria (and other prokaryotes) have the ability to move by means of flagella. Flagella are composed of the globular protein flagellin. They are extremely long and thin and cannot be seen by the light ... pair of rings, while Gram- negative bacteria have both inner and outer pairs of rings).
Description : Are there any unique ways that humans derive benefits from microorganisms?
Last Answer : Humans derive substantial benefits from the activities of microorganisms. For example, many microbial species live in and on various parts of the body and prevent pathogenic bacteria from gaining a ... and used to produce vitamins, enzymes, organic acids, and other essential growth factors.
Description : Are chromosomes the only parts of bacteria that can be transformed?
Last Answer : Bacteria possess extrachromosomal loops of DNA called plasmids. Plasmids are small, self-replicating loops of DNA with about 10 to 50 genes. They are not essential for the survival of the ... process called curing, which can occur spontaneously or can be induced by certain environmental factors.
Description : What is the general course of development for cases of syphilis?
Last Answer : The etiologic agent of syphilis is the spirochete Treponema pallidum. The organism is motile and can be observed moving about under the dark- field microscope. It is extremely difficult to cultivate in ... - looking face, and damage to the nose. Congenital syphilis may also result in stillbirth.
Description : Abnormalities in chromosome number give rise to diseases of karyotype. How might these aberrations occur?
Last Answer : Under usual conditions of meiotic division, each tetrad separates into its constituent homologous chromosomes. One homologue migrates to one pole and the other homologue to the opposite pole during ... and internal inversion of chromosomes or chromosome parts may also produce diseases of karyotype.
Description : What is triclosan?
Last Answer : Triclosan has properties of a phenol and is extremely popular in antibacterial products such as hand sanitizers, antibacterial soaps, lotions, toothpastes, and even as an antimicrobial ... antibiotics. This is of particular concern with antibiotic resistant strains of Staphylococcus aureus.
Description : Cellulose is the major component of cell walls of (a) Pseudomonas (b) Saccharomyces (c) Pythium (d) Xanthomonas.
Last Answer : (c) Pythium
Description : For retting of jute the fermenting microbe used is (a) methanophilic bacteria (b) butyric acid bacteria (c) Helicobacter pylori (d) Streptococcus lactin.
Last Answer : b) butyric acid bacteria
Description : Bacterial leaf blight of rice is caused by a species (a) Alternaria (b) Erwinia (c) Xanthomonas (d) Pseudomonas.
Last Answer : (c) Xanthomonas
Description : The term phylum was given by (a) Cuvier (b) Haeckel (c) Theophrastus (d) Linnaeus.
Last Answer : (c) Theophrastus
Description : One indirect way to determine microbial growth is using a _____. a. UV light b. Spectrophotometer c. Light meter d. Radioactive counter
Last Answer : b. Spectrophotometer
Description : _____ from the mold Aspergillus oryzaeis used as a spot remover in laundry presoaks, as an adhesive, and in baking, where it digests starch to glucose. a. Amylase b. Lactase c. Sucrase d. Maltase
Last Answer : a. Amylase
Description : The alcoholic content of beer is approximately _____. a. 0.02 b. 0.04 c. 0.06 d. 0.08
Last Answer : b. 0.04