Description : Which of the following statements is not true regarding Mycobacterium tuberculosis and/or the disease it causes? A.The pathogen contains mycolic acid in its cell wall B.The pathogen can live inside macrophages C.Antibodies to the pathogen are protective D.None of these
Last Answer : C.Antibodies to the pathogen are protective
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 : 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 : Isoniazid has a very narrow drug spectrum as the active form of the drug specifically interferes with cell wall synthesis in _____ by inhibiting the production of mycolic acid in the cell wall. a. Staphylococcus b. Streptococcus c. Enterococcus d. Mycobacterium
Last Answer : d. Mycobacterium
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 : The gram-positive bacteria lack __________ structure/component? A.outer membrane B.murein C.teichoic acid D.plasma membrane
Last Answer : A.outer membrane
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 : Weil-Felix reaction is based on sharing of antigens between A.sheep RBCs and EB virus B.mycoplasma and human O group RBCs C.rickettsial antigens and antigens of certain strains of Proteus D.none of these
Last Answer : C.rickettsial antigens and antigens of certain strains of Proteus
Description : Bacillus subtilis makes a good "bacterial factory" in genetic engineering because _____. a. it normally retains the products it makes b. it is not a human pathogen c. contains endotoxins in it's cell wall d. traditionally ferments sugars
Last Answer : b. it is not a human pathogen
Description : Which of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm
Description : Which of the following is not true for prokaryotic organism? A- Nucleus is not bounded by nuclear membrane B- Chromosomes does not contain histones C- 80S ribosomes are distributed in cytoplasm D- Cell wall contains peptidoglycan as one of the major component
Last Answer : 80S ribosomes are distributed in cytoplasm
Description : The sulfonamides interfere with bacterial metabolism by a. blocking cell wall synthesis. b. disrupting folic acid metabolism. c. reacting with bacterial cell membranes. d. inhibiting DNA replication.
Last Answer : b. disrupting folic acid metabolism.
Description : Trimethoprim and sulfamethoxazole are examples of synthesis. a. Sulfonamides; PABA b. Penicillins; Cell Wall c. Sulfonamides; Folic Acid d. Macrolides; Protein
Last Answer : c. Sulfonamides; Folic Acid
Description : Which of the following characteristics would not be used to classify viruses? A.Type of cell wall structure B.Type of nucleic acid C.Presence of an envelope D.Symmetry
Last Answer : A.Type of cell wall structure
Description : Chloramphenicol is particularly effective in the treatment of (a) Diphtheria (b) Tuberculosis (c) Emphysema (d) Rickettsial diseases (e) Streptomyces pyogenes infections
Last Answer : Ans: D
Description : DPT vaccine is categorized as which of the following? (1) Anti viral vaccine (2) Anti protozoan vaccine (3) Anti rickettsial vaccine (4) A combined vaccine
Last Answer : (4) A combined vaccine Explanation: Dpr refers to a class of combination vaccines against three infectious diseases in humans: diph-theria, pertussis (whooping cough), and tetanus, The vaccine ... diphtheria and tetanus toxoids and killed whole cells of the organism that cause pertpssis (wP).
Description : Rifampin kills tubercle bacilli by: A. Binding to mycobacterial DNA dependent RNA polymerase B. Inhibiting mycobacterial DNA synthesis C. Inhibiting synthesis of mycolic acids in mycobacteria D. Damaging mycobacterial mitochondria
Last Answer : A. Binding to mycobacterial DNA dependent RNA polymerase
Description : DPT vaccine is categorized as which of the following ? (1) Anti viral vaccine (2) Anti protozoan vaccine (3) Anti rickettsial vaccine (4) A combined vaccine
Last Answer : A combined vaccine
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 : Antifungal drugs, such as_ __, inhibit proper formation of a. Miconazole; A Plasma Membrane b. Griseofulvin; Dna c. Ketoconazole; A Cell Wall d. Tiucytosine; A Rnicrotubule
Last Answer : d. Tiucytosine; A Rnicrotubule
Description : Vancomycin inhibits _____________ synthesis. a. protein b. DNA c. bacterial cell wall d. RNA
Last Answer : c. bacterial cell wall
Description : All the following are drugs or drug classes blocking cell wall synthesis except: a. Cephalosporins. b. Carbapenems. c. Monobactams. d. Tetracyclines.
Last Answer : a. Cephalosporins.
Description : Which one of the following is NOT true of exotoxins? a. They are proteins. b. They are part of cell wall structure. c. They are released from live bacterial cells. d. They trigger antibody production.
Last Answer : d. They trigger antibody production.
Description : Which one of the following is true of the hypha? a. It is the morphological unit of the fungus. b. It is visible without a microscope. c. It lacks a cell wall. d. None of the above (A-C) is true.
Last Answer : a. It is the morphological unit of the fungus.
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 : Cell wall protein of Streptococcus pyogenescrossreactswith human A- synovial fluid B- cardiac valves C- myocardium D- vascular intima
Last Answer : myocardium
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 : 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 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 : Mycoplasmas are different from the other prokaryotes by A- presence of chitin in cell walls B- presence of murrain in cell walls C- presence of proteins in cell wallsD- bsence of cell wall itself
Last Answer : bsence of cell wall itself
Description : The unifying feature of the archaea that distinguishes them from the bacteria is A- habitats which are extreme environments with regard to acidity B- absence of a nuclear membrane temperature ... of a cell wall containing a characteristic outer membrane D- cytoplasmic ribosomes that are 70S
Last Answer : absence of a nuclear membrane temperature
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 : Cell wall of Fungi are characterized by the presence of A Sugurs B Pepdigoglycan C Chitin D Lipopolysaccharide
Last Answer : C Chitin
Description : Which of the following organisms do not have rigid cell wall A Archaea B Chlamydia C Mycoplasma D Rickettsia
Last Answer : D Rickettsia
Description : The stomach is a chemical barrier to infection because the stomach a. Contains bile. b. Harbors helicobacterpylori, a member of the host microbiota. c. Possesses defensive cells. d. Has an acid ph.
Last Answer : d. Has an acid ph.
Description : The _____ cell contains on its surface a CD4 receptor site that enhances binding to the macrophage. a. Helper T b. molecular patterns (PAMPs) c. plasma d. B
Last Answer : a. IgG
Description : An Hfr cell a. Has A Free F Factor In The Cytoplasm. b. Has A Chromosomally Integrated F Factor. c. Contains A Prophage For Conjugation. d. Cannot Conjugate With A F- Recombinant.
Last Answer : b. Has A Chromosomally Integrated F Factor.
Description : A newly discovered microscopic structure is hypothesized to be a living organism. Which of the following lines of evidence would support the contention that this organism may be alive? A- .It contains DNA B- It is made of a single cell C- It utilizes energy D- All of these
Description : The cell membrane of archaeal cells contains a. A monolayer. b. Sterols. c. Ester linkage d. All of the above (A—C are correct.)
Last Answer : a. A monolayer.
Description : The cell wall of both bacteria and cyanobactena contains: (a) Lipid (b) Pectin (c) Protein (d) muramic acid
Last Answer : Ans. ((d))
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 : 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 : When a viral nucleic acid becomes part of the host cell chromosome it is called _____. a. lysis b. lysogeny c. maturation d. latent
Last Answer : b. lysogeny
Description : Which of the following sequences has helped in identifying eukaryotes, eubacteria and archeabacterial cell types? A- Signature sequence B- Signal sequence C- Shine-Dalgarno sequence D- Amino acid sequence
Last Answer : Signature sequence
Description : Polluted water usually contains coliform bacteria like _____. a. Streptococcus b. Proteus c. Escherichia coli d. Pseudomonas
Last Answer : c. Escherichia coli
Description : The colostrum, or first milk of a nursing mother, contains _____ that is transferred to the nursing child. a. IgA b. IgG c. IgM d. IgE
Last Answer : a. IgA
Description : A/an _____ vaccine contains inactivated toxins. a. toxigenic b. toxoid c. antitoxin d. immunotoxic
Last Answer : b. toxoid