platings 1n2 Flashcards
Expression of a biochemical molecule in an organisim requires.
a. replication only
b. transcription only
c. transcription and translation of a protein
d. all of the above
c. transcription and translation of a protein
Bacterial endotoxins are
a. all the same
b. part of the gram-negative cell wall
c. capable of causing a systemic shock response
d. all of the above
d. all of the above
A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is
a. capsule
b. cell wall
c. flagellum
d. peptifoglycan
a. capsule
when flagella are distributed all around a bacterial cell, the arrangement is called
a. polar
b cephhalotrichous
c. peritrichous
d. atrichous
c. peritrichous
A shiny, sticky colony of streptococcus pneumonaie is likely to be
a. encapsulated and pathogenic
b. nonencapsulated and pathogenic
c. nonencapsulated and nonpathogenic
d. encapsulated and nonpathogenic
a. encapsulated and pathogenic
A bacterial cell wall does all the following except
a. gives shape and rigidity to the cell
b. is the site of action for some antibiotics
c. is associated with some symptoms of disease
d. protects the cell from phagocytosis
d. protects the cell from phagocytosis
A gram negative cell wall is____ than a gram positive one
a. thicker
b. thinner
c. both
d. neither
b. thinner
Flagella and pili are made of
a. lipids
b. carbohydrates
c. nucleic acids
d. protein
d. protein
Differences between eukaryotic and prokaryotic cells include all of the following except
a. eukaryotic cells have mitochondria walls
b. eukaryotic cells have cillia and flagella
with complex structure
c. prokaryotic cells have more complex
d. prokaryotic cells have no genetic material
d. prokaryotic cells have no genetic material
which of the following contains DNA
a. gram positive cell wall
b. capsule
c. pili
d. plasmids
d. plasmids
The cell wall type that is most vulnerable to the action of penincillin is
a. gram negative
b. gram positive
c. both
d. neither
b. gram positive
If this is the base sequence of a strand of DNA (ATGCC) what would be the base sequence of the complimentary DNA strand?
a. TACGG
b. ATGCC
c. UATCGG
d. AUUGCC
a. TACGG
Virus infecting bacteria
a. prions
b. phage
c. bacteria
d. myxomycetes
b. phage
Chemical composition of spores
a. calcium dipocolinic acid
b. sodium dipicolinate
c. both
d. neither
c. both
Gram positive cocci
a. Neisseria
b. Klebsiella
c. Streptococci
d. None of the above
c. Streptococci
Gram’s staining reaction reporting includes all EXCEPT
a. grams reaction
b. shape
c. arrangement
d. size
d. size
Spirochetes
a. spiral shaped organism
b. have tight and loose coils
c. both
d. neither
c. both
Acts as mordant
a. crystal violet
b. gram’s iodine
c. acetone
d. safranin O
b. gram’s iodine
Infectious proteins
a. virus
b. bacteria
c. all of the above
d. neither
d. neither
Transformation
a. rough stain, virulent
b. smooth strain, non virulent
c. both
d. neither
d. neither
Which of the following best descibes “biorisk??
a. the risk of accidental contamination of lab equipment
b. The risk associated with working in a laboratory setting
c. the risk of biological agents causing harm to humans, animals or the environment
d. the risk of spilling chemicals in the laboratory
c. the risk of biological agents causing harm to humans, animals or the environment
What does the term “inactivation” refer to in the context of biorisk management?
a. disposing a laboratory waste safetly
b. the reduction of the virulence of a pathogen
c. the use of personal protective equipment (ppe)
d. the cleaning of laboratory surfaces
b. the reduction of the virulence of a pathogen
Which of the following organizations provides guidelines for biosafety and biosecurity practices?
a. WHO
b. GMPP
c. EPA
d. FDA
a. WHO
What is the primary difference between disinfection and sterilization?
a. disinfection and sterilization are terms used interchangeably
b. disinfection kills all microorganisms, while sterilization only reduces their numbers
c. disinfection eliminates all microorganisms, while sterilization kills most of them
d. disinfection reduces the number of microorganisms to a safe level, while sterilization kills all microorganisms
d. disinfection reduces the number of microorganisms to a safe level, while sterilization kills all microorganisms.
Which of the following is an example of a physical method of disinfection or sterilization?
a. antibiotics
b. enzymatic treatment
c. UV radiation
d. pH adjustment
c. UV radiation
