Sem 3 BRS Micro - General Properties Of Microorganisms; /Bacteria
- 1.A pharmaceutical company has developed a new compound that is well tolerated by the body and inhibits the sterol ergo sterol synthesis. Screening of anti-infectious agent activity should be directed toward
- A.
Bacteria
- B.
Chlamydia species
- C.
Fungi
- D.
Rickettsia species
- E.
Viruses
- 2.50S ribosomal subunits are found in
- A.
Bacteria
- B.
Fungi
- C.
Prions
- D.
Protozoa
- E.
Viruses
- 3.The normal flora of the large intestine consists mainly of
- A.
Bacteria
- B.
Fungi
- C.
Protozoa
- D.
Viruses
- E.
No microbial agents
- 4.The minimal concentration of alcohol necessary to kill bacteria and enveloped viruses is
- A.
30%
- B.
40%
- C.
50%
- D.
60%
- E.
70%
- 5.Human obligate intracellular pathogens that depend on the host cell for ATP production are
- A.
Bacteriophages
- B.
Mycoplasma species
- C.
Prions
- D.
Rickettsia species
- E.
Viroids
- 6.Dimorphism is a characteristic of
- A.
Bacteria
- B.
Fungi
- C.
Prions
- D.
Rickettsia species
- E.
Viruses
- 7.A new infectious agent has been isolated from deer ticks. It lacks a cell wall but has 70S ribosomes. This agent is most likely a
- A.
Bacterium
- B.
Chlamydia species
- C.
Mycoplasma species
- D.
Rickettsia species
- E.
Virus
- 8.Chapter 2 BACTERIA A bacterial toxin with super antigen activity is produced by
- A.
Clostridia tetani
- B.
Bordetella pertussis
- C.
Escherichia coli
- D.
Staphylococcus aureus
- E.
Vibrio cholera
- 9.Sugar transport into bacteria is frequently facilitated by
- A.
Acetyl transferase
- B.
Neuraminidases
- C.
Oxidases
- D.
Penicillin-binding proteins
- E.
Phospho transferases
- 10.Thayer-Martin and Martin-Lewis media are used to isolate and identify E. coli
- A.
E. coli
- B.
Mycobacteria
- C.
Neisseria
- D.
Salmonella
- E.
Shigella
- 11.B-lactamases confer antibiotic resistance by
- A.
Altering antibiotic permeability
- B.
Altering penicillin-binding proteins
- C.
Altering 70S ribosome structure
- D.
Modifying cellular RNA polymerase
- E.
Modifying antibiotic structure
- 12.Polymers of N-acetyl glucosamine and N-acetyl muramic acid are found in which of the following structures?
- A.
Teichoic acid
- B.
Cell wall
- C.
Glycocalyx
- D.
Lipopolysaccharide
- 13.A phage that is not inactivated by proteases is called a
- A.
Prophage
- B.
Virulent phage
- C.
Temperate phage
- D.
Filamentous phage
- 14.Bacteria that synthesize organic compounds from inorganic compounds are
- A.
Heterotrophs
- B.
Obligate anaerobes
- C.
Aerobes
- D.
Facultative anaerobes
- E.
Autotrophs
- 15.A bacterial structure involved in adherence is
- A.
Capsule
- B.
Lipopolysaccharide
- C.
Ordinary pili
- D.
O-specific side-chain
- E.
Teichoic acid
- 16.Aminoglycoside antibiotics are
- A.
Bactericidal for Gram-positive bacteria
- B.
Inactivated by R-factor phosphor transferases
- C.
Mycolic acid synthesis inhibitors
- D.
Peptidoglycan synthesis inhibitors
- E.
Require bacterial growth for the effect
- 17.A-B subunit structure as it relates to bacterial pathogenesis refers to the structure of
- A.
Bacterial exotoxins
- B.
Gram-negative bacteria endotoxin
- C.
Nucleic acid inhibitor antibiotics
- D.
Penicillin-binding proteins
- E.
Resistance transfer factors
- 18.Which of the following displays the Pasteur effect?
- A.
Heterotrophs
- B.
Obligate anaerobes
- C.
Aerobes
- D.
Facultative anaerobes
- E.
Autotrophs
- 19.Which of the following toxins acts on synaptosomes?
- A.
E. coli heat-labile toxin
- B.
Clostridium tetani exotoxin
- C.
Corynebacterium diphtheria exotoxin
- D.
Pseudomonas aeruginosa exotoxin
- E.
Clostridium perfringens alpha-toxin
- 20.Superoxide dismutase-containing bacteria
- A.
Need superoxide to grow
- B.
Are frequently obligate anaerobes
- C.
Grow slowly in the presence of CO2
- D.
Produce hydrogen peroxide from hydrogen ion and the superoxide free radical (O2-)
- 21.Lysogenic phage conversion involves
- A.
The transformation of a virulent phage to a lysogenic phage
- B.
A change in bacterial phenotype due to the presence of a prophage
- C.
The conversion of a prophage to a temperate phage
- D.
The incorporation of a prophage into the bacterial chromosome
- 22.Bacteria capable of growth in a high salt concentration are best isolated in which of the following media?
- A.
Minimal growth media
- B.
Complex growth media
- C.
Differential growth media
- D.
Selective growth media
- 23.Bacteria lacking superoxide dismutase are
- A.
Heterotrophs
- B.
Obligate anaerobes
- C.
Aerobes
- D.
Facultative anaerobes
- E.
Autotrophs
- 24.The regulation of enzyme activity in bacterial cells can
- A.
Be coupled to the binding of effector molecules
- B.
Be controlled by a catabolite activator protein(CAP)
- C.
Occur via attenuation sequences
- D.
Involve inducer molecules
- 25.The plasma membrane
- A.
Contains matrix porins
- B.
Includes endotoxin
- C.
Contains glycocalyx
- D.
Contains the enzymes involved in bacterial oxidative phosphorylation
Questions: 17 | Attempts: 12465 | Last updated: May 4, 2017
-
Sample QuestionBacteria can be which of the following shapes?
Questions: 7 | Attempts: 6994 | Last updated: Dec 12, 2019
-
Sample QuestionWhich bacteria cell part goes in the box labelled a?
Questions: 13 | Attempts: 4864 | Last updated: Jan 22, 2013
-
Sample QuestionWhat are examples of Viruses?
Back to top