Description : _____ is an example of a differential stain technique. a. Simple staining b. Negative staining c. Contrast staining d. Gram staining
Last Answer : d. Gram staining
Description : Which of the following bacteria lack a cell wall and are therefore resistant to penicillin? A- Cyanobacteria B- Mycoplasmas C- .Bdellovibrios D- .Spirochetes
Last Answer : Mycoplasmas
Description : Which of the following bacteria lack a cell wall and are therefore resistant to penicillin? A- Cyanobacteria B- Mycoplasmas C- Bdellovibrios D- Spirochetes
Description : Methylene blue staining of metachromatic granules is diagnostic for which of the following bacteria? a. Mycobacterium Tuberculosis b. Coiynebacterium Diphtheriae c. Chlamydia Pneumoniae d. Bordetella Pertussis
Last Answer : b. Coiynebacterium Diphtheriae
Description : A characteristic of cell staining of Y. pestis is a a. Gram-Positive Staining. b. Bipolar Staining. c. Gram-Positive Staining. d. Gram-Variable Staining.
Last Answer : b. Bipolar Staining
Description : The first forming microbial elements of plaque are: A. Aerobic gram positive G+ B. Aerobic gram negative G C. Anaerobic gram negative G D. Spirochetes E. Anaerobic gram positive G+
Last Answer : A. Aerobic gram positive G+
Description : ________ is seen with periods of fever and chills when many spirochetes are present in the blood. a. Rabbit fever b. Lyme disease c. Relapsing fever d. The Plague
Last Answer : c. Relapsing fever
Description : Conjugation pili are found only on some ______ bacteria, though it may occur between cells of various bacteria. a. Gram-positive b. Gram-negative c. Acid-fast d. Capsule containing
Last Answer : b. Gram-negative
Description : The cell wall of A.gram-positive bacteria are thicker than gram-negative bacteria B.gram-negative bacteria are thicker than gram-positive bacteria C.both have same thickness but composition is different D.none of these
Last Answer : A.gram-positive bacteria are thicker than gram-negative bacteria
Description : Which of the following is true about cell wall of gram-positive bacteria? A- It consists of multiple layers B- It is thicker than that associated with gram-negative bacteria C- It contains teichoic acids D- D.All of these
Last Answer : D.All of these
Description : Swimming towards a chemical of bacteria is termed as A- positive chemotaxis B- negative chemotaxis C- phototaxis D- magnetotaxis
Last Answer : positive chemotaxis
Description : Porins are located in A- the outer membrane of gram-negative bacteria B- he peptidoglycan layer of gram-positive bacteria C- the cytoplasmic membrane of both gram-negative and gram-positive bacteria D- the periplasmic space of gram-negative bacteria
Last Answer : the outer membrane of gram-negative bacteria
Description : Teichoic acids are typically found in A- cell walls of gram positive bacteria B- outer membranes of gram positive bacteria C- cell walls of gram negative bacteria D- outer membranes of gram negative bacteria
Last Answer : cell walls of gram positive bacteria
Description : The cell wall of A- gram-positive bacteria are thicker than gram-negative bacteria B- gram-negative bacteria are thicker than gram-positive bacteria C- both have same thickness but composition is different D- none of these
Last Answer : gram-positive bacteria are thicker than gram-negative bacteria
Description : Which of the following is true about cell wall of gram-positive bacteria? A-It consists of multiple layers B- It is thicker than that associated with gram-negative bacteria C- It contains teichoic acids D- All of these
Last Answer : All of these
Description : Which of the following may contain fimbriae? A- Gram-positive bacteria B- .Gram-negative bacteria C- Both (a) and (b) D- None of these
Last Answer : C. A and b
Description : Acid-fast staining is typicaly used to stain which bacterial genus? a. Haemophilus b. Streptococcus c. Klebsiella d. Mycobacterium
Last Answer : d. Mycobacterium
Description : Which of the following methods is most likely to be quantitative? A-Dilution and plating B- Gram staining C- Wet mount D-None of these
Last Answer : Dilution and plating
Description : Gram staining was introduced by A- Christian gram B- Alfred Gram C- Robertcook D- Louis Pasteur
Last Answer : Christian gram
Description : Which of the following statements about social responsibility is FALSE? Social responsibility : A)can be viewed as a contract with society B)is a company's obligation to maximise its positive ... on society C)is a vital factor in marketing strategy decisions D)relates to individual decisions.
Last Answer : D)relates to individual decisions.
Description : The drug isoniazid is used widely in contemporary medicine to a. Treat tuberculosis. b. Prevent fungal overgrowth in the intestine. c. Clear away wound infections. d. Eliminate infections due to gram-negative bacteria.
Last Answer : a. Treat tuberculosis.
Description : Which of the following gram-negative bacteria is/are not aerobic? A.Pseudomonas B.Neisseria C.Escherichia D.None of these
Last Answer : C.Escherichia
Description : Gram-negative bacteria would stain_________ with the Gram stain and have _______in the wall. a. orange-red; Teichoic acid b. orange-red; lipopolysaccharide c. purple; peptidoglycan d. purple; Teichoic acid
Last Answer : c. purple; peptidoglycan
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 : The gram-positive bacteria lack __________ structure/component? A.outer membrane B.murein C.teichoic acid D.plasma membrane
Last Answer : A.outer membrane
Description : Gram-positive bacteria, responsible for food poisoning, is/are A.Mycoplasmas B.Pseudomonas C.Clostridia D.all of these
Last Answer : C.Clostridia
Description : Gram-positive bacteria, responsible for food poisoning, is/ar A.Mycoplasmas B.Pseudomonas C.Clostridia D.all of these
Last Answer : .Clostridia
Description : Selective media facilitate growth of only one kind of organism.Saboraud medium is used to selectively isolate A- coliform bacteria B- gram positive bacteria C- .yeasts D- acid fast organisms
Last Answer : .yeasts
Description : The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known as A-lipase B- .lysozyme C- .pectinase D-.peroxidase
Last Answer : .lysozyme
Description : Which one of the following is NOT a genus within the gram-positive bacteria? a. Staphylococcus b. Methanogens c. Mycoplasma d. Bacillus and Clostridium
Last Answer : b. Methanogens
Description : Gentamicin and other aminoglycoside drugs are widely prescribed for treatment of _____ infections. a. fungal b. gram-positive bacterial c. gram-negative bacterial d. staphylococcal
Last Answer : c. gram-negative bacterial
Description : The sulfa drugs work by _______ with PABA in making folic acid. a. Positive Feedback b. Negative Feedback c. Competitive Inhibition d. Allosteric Inhibition
Last Answer : c. Competitive Inhibition
Description : Penicillins are useful in treating a. Gram-positive infections. b. Leprosy. c. Gram-negative infections. d. Tuberculosis.
Last Answer : a. Gram-positive infections.
Description : The skin is a. Dominated By Gram-Negative Bacterial Cells. b. Free Of Bacterial Cells. c. Without A Microbiota. d. Dominated By Gram-Positive Bacterial Cells.
Last Answer : d. Dominated By Gram-Positive Bacterial Cells.
Description : The majority of bacterial species that cause foodborne and waterborne illnesses in humans are _____. a. Gram-Negative Rods b. Gram-Negative Cocci c. Gram-Positive Rods d. Rods Without A Wall
Last Answer : a. Gram-Negative Rods
Description : Escherichia coli is a common gram that can be a cause of a. positive rod; hemorrhagic colitis b. negative rod; traveler‘s diarrhea c. positive coccus; typhoid fever d. negative rod; cholera
Last Answer : b. negative rod; traveler‘s diarrhea
Description : Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae? A.Theyare catalase-positive B.Theyare oxidase-negative C.They ferment glucose D.They reduce nitrates to nitrites
Last Answer : B.Theyare oxidase-negative
Description : Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells ... selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Last Answer : CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Description : Cyanobacteria have A-a gram-positive cell wall B- a gram-negative cell wall C- Neither (a) nor (b) D-No cell wall
Last Answer : a gram-negative cell wall
Description : What is the best use of negative staining?
Last Answer : size and shape
Description : Without restriction endonucleases, it would be very difficult to a. Force Plasmids into Bacteria. b. Chemically Open Dna Molecules. c. Replicate Dna In A Recombinant Cell. d. Bring About Mutations In Bacteria.
Last Answer : b. Chemically Open Dna Molecules.
Description : The bacterium Deinococcus radiodurans has been of interest to molecular biologists because a. it has the smallest known bacterial genome. b. it is a "living fossil" linking the Bacteria and Archaea. c. it has the largest known bacterial genome. d. it is very resistant to radiation damage.
Last Answer : d. it is very resistant to radiation damage.
Description : Which of the following theory is supported by the genomic sequence of the obligate intracellularparasite Rickettsia prowazekii ? A- Parasitic bacteria have very large genomes B- Parasites have a ... viruses C- Mitochondria have evolved from endosymbiotic bacteria D- All bacteria evolved from viruses
Last Answer : Mitochondria have evolved from endosymbiotic bacteria
Description : Which of the following most probably does not exist in the kids acute gingivitis, A. Spirochetes B. Streptococcus C. Staphylococcus
Last Answer : A. Spirochetes
Description : Which of the following is TRUE about syphilis: A. The spirochetes disseminate rapidly throughout the body within 24hour after contact B. Both the primary chancre and the secondary mucous patch stages of ... Only the lesions of the primary and secondary stages are contagious D. All of the above
Last Answer : D. All of the above
Description : In syphilis: A. Primary lesion is not contagious B. Oral lesions are not seen in less than 1% C. Spirochetes disseminate in 24 hours
Last Answer : C. Spirochetes disseminate in 24 hours
Description : What is viewed through an electron microscope? (1) Electrons and other elementary particles (2) Structure of bacteria and viruses (3) Inside of human stomach (4) Inside of the human eye
Last Answer : (2) Structure of bacteria and viruses Explanation: Electron microscopes are used to observe a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, ... microscope because electrons have wavelengths about 100,000 times shorter than visible light photons.