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 : 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 : 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 : 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 : 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 : The phylum Cyanobacteria are unique because they _____. a. convert nitrogen to a useable form b. are poisonous c. photosynthesize d. have a waxy cell wall
Last Answer : c. photosynthesize
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 : 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 : 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 : 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 : 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 : 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 : 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 : Difference in Gram positive and Gram negative bacteria is due to (a) cell wall (b) cell membrane (c) ribosome (d) cytoplasm.
Last Answer : (a) cell wall
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 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 among the following is the condition to avoid separation of connected members? a. Force acting on the connected members should be negative b. Force acting on the connected members should be ... acting on the connected members should be neither positive nor negative d. None of the above
Last Answer : a. Force acting on the connected members should be negative
Description : If one premise is negative the conclusion must be________. A) Negative B) Positive C) Both negative and positive D) Neither negative nor positive.
Last Answer : A) Negative
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 is most likely to be exposed on the surface of a gram-negative bacterium? A.Pore protein (porin) B.Protein involved in energy generation C.Lipoteichoic acid D.Phospholipids
Last Answer : A.Pore protein (porin)
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 : Which of the following is exposed on the outer surface of a gram-negative bacterium?A- O-antigen of lipopolysaccharide (LPS) B- Polysaccharide portion of lipoteichoic acid (LTA) C- Braun lipoprotein D- .Electron transport system components
Last Answer : O-antigen of lipopolysaccharide (LPS)
Description : Which is most likely to be exposed on the surface of a gram-negative bacterium? A- Pore protein (porin) B- Protein involved in energy generation C- .Lipoteichoic acid D- Phospholipids
Last Answer : Pore protein (porin)
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 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 most common cause of an invasive wound infection, such as a burn, is a. gram-positive bacterial species. b. treponema pallidum. c. Pseudomonas aeruginosa. d. Escherichia coli.
Last Answer : c. Pseudomonas aeruginosa.
Description : This gram-positive rod can cause meningoencephalitis, septicemia, and newborn meningitis. a. Bacillus cereus b. Listeria monocyto genes c. Clostridium peringens d. Escherichia coli
Last Answer : b. Listeria monocyto genes
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 : Which of the following may be most likely to be missing from a gram-positive bacterium? A.Penicillin binding protein B.Peptidoglycan C.Lipopolysaccharide D.Phospholipid bilayer membrane
Last Answer : C.Lipopolysaccharide
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 : Gram positive cells have a A- second outer membrane that helps to retain the crystal violet stain B- multiple layer of peptidoglycan that helps to retain the crystal violet stain C- .thick capsule that traps the crystal violet stain D- periplasmic space that traps the crystal violet
Last Answer : multiple layer of peptidoglycan that helps to retain the crystal violet stain
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 : 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 : A key energy compound in bacterial photosynthesis by cyanobacteria is ______ and a major end-product is ______. a. GTP; protein b. citrate; lactose c. glucose; chlorophyll d. ATP; glucose
Last Answer : c. glucose; chlorophyll
Description : Which of the following does not produce oxygen as a product of photosynthesis? A- A.Oak trees B.Purple sulfur bacteria C.Cyanobacteria D.Phytoplankton
Last Answer : Purple sulfur bacteria
Description : Genetic and biochemical similarities between contemporary cyanobacteria and eukaryoticchloroplasts are accepted to mean that A- .eukaryotes evolved from bacteria B- eukaryotes evolved from archaea C- . ... evolved in eukaryotes D- .cyanobacteria arose from chloroplasts which escaped from plant cells
Last Answer : eukaryotes evolved from archaea
Description : Gram negative organisms are largely insensitive to benzyl penicillin because (a) They produce large quantities of penicillinase (b) They do not utilize D-alanine whose incorporation in the cell wall is ... lipoprotein-peptidoglycan multiplayer cell wall of gram-negative bacteria (d) Both (a) and (b)
Last Answer : Ans: C
Description : Indicate the attribute that is common to both polymyxin B and bacitracin: A. Both are active against gram negative bacteria B. Both are too toxic for systemic use C. Both act by inhibiting bacterial cell wall synthesis D. Both a
Last Answer : B. Both are too toxic for systemic use
Description : Gram negative organisms are largely insensitive to benzyl penicillin because: A. They produce large quantities of penicillinase B. They do not utilise D-alanine whose incorporation in the cell wall is inhibited ... multilayer cell wall of gram negative bacteria D. Both A' and B' are correct
Last Answer : . Benzyl penicillin is not able to penetrate deeper into the lipoprotein-peptidoglycan multilayer cell wall of gram negative bacteria