BIO 250 LAB QUIZ 1 QUESTIONS WITH
CORRECT ANSWERS
Bio safety levels (BSL) measure what? - correct answers✔✔an organisms
controllability, infectivity, virulence, pathogenicity, antibiotic resistance, vaccine,
treatment, mortality.
BSL 1 - correct answers✔✔does not normally cause disease in people
BSL 2 - correct answers✔✔Associated with disease
BSL 3 - correct answers✔✔indigenous/exotic agents that may have serious or lethal
consequences and with potential for aerosol transmission
BSL 4 - correct answers✔✔dangerous/exotic agents of a life-threatening nature or
unknown risk of transmission
Containment - correct answers✔✔safe methods and procedures to handle micro
organisms
Aseptic technique prevents contamination of - correct answers✔✔You
Others
Experiment
Work Area
External Enviroment
Ubiquitous - correct answers✔✔found everywhere
Pathogen - correct answers✔✔micro organisms that cause disease
Opportunistic pathogen - correct answers✔✔cause disease in right circumstances
Inoculation - correct answers✔✔implantation of micro organisms on or in media
Culture - correct answers✔✔cultivation of the micro organisms
What has actually grown
, Turbid - correct answers✔✔cloudy inoculation of growth
Colony - correct answers✔✔A discrete mass of millions or more cells ideally from one
cell
Points of first few labs - correct answers✔✔practice aseptic technique
Sterile - correct answers✔✔completely free of all life
Pure culture - correct answers✔✔one type of colony
Mixed culture - correct answers✔✔more than one type of colony
Parfocal - correct answers✔✔once its in focus it stays in focus as you move un in
magnification
Parcentric - correct answers✔✔What is in the center will stay in the center
Why is oil needed for high magnification - correct answers✔✔oil is needed to refract
light the same as glass does
4x - correct answers✔✔scanning
10x - correct answers✔✔low power
40x - correct answers✔✔high power (high dry)
100x - correct answers✔✔oil imersion
Total magnification - correct answers✔✔ocular magnification X objective magnification
Working distance - correct answers✔✔space between slide and lens
As magnification increases field of view.... - correct answers✔✔decreases
Resolution - correct answers✔✔clarity of an image produced by a set of lenses
Resolving power - correct answers✔✔ability of a lens to separate tow objects in a
microscopic field
Function of wavelength of light and a property of the lens called numerical aperture
Numerical aperture - correct answers✔✔mathematical expression that describes the
ability of the condenser lens to concentrate light rays from the light source
Some refracted light is always lost
CORRECT ANSWERS
Bio safety levels (BSL) measure what? - correct answers✔✔an organisms
controllability, infectivity, virulence, pathogenicity, antibiotic resistance, vaccine,
treatment, mortality.
BSL 1 - correct answers✔✔does not normally cause disease in people
BSL 2 - correct answers✔✔Associated with disease
BSL 3 - correct answers✔✔indigenous/exotic agents that may have serious or lethal
consequences and with potential for aerosol transmission
BSL 4 - correct answers✔✔dangerous/exotic agents of a life-threatening nature or
unknown risk of transmission
Containment - correct answers✔✔safe methods and procedures to handle micro
organisms
Aseptic technique prevents contamination of - correct answers✔✔You
Others
Experiment
Work Area
External Enviroment
Ubiquitous - correct answers✔✔found everywhere
Pathogen - correct answers✔✔micro organisms that cause disease
Opportunistic pathogen - correct answers✔✔cause disease in right circumstances
Inoculation - correct answers✔✔implantation of micro organisms on or in media
Culture - correct answers✔✔cultivation of the micro organisms
What has actually grown
, Turbid - correct answers✔✔cloudy inoculation of growth
Colony - correct answers✔✔A discrete mass of millions or more cells ideally from one
cell
Points of first few labs - correct answers✔✔practice aseptic technique
Sterile - correct answers✔✔completely free of all life
Pure culture - correct answers✔✔one type of colony
Mixed culture - correct answers✔✔more than one type of colony
Parfocal - correct answers✔✔once its in focus it stays in focus as you move un in
magnification
Parcentric - correct answers✔✔What is in the center will stay in the center
Why is oil needed for high magnification - correct answers✔✔oil is needed to refract
light the same as glass does
4x - correct answers✔✔scanning
10x - correct answers✔✔low power
40x - correct answers✔✔high power (high dry)
100x - correct answers✔✔oil imersion
Total magnification - correct answers✔✔ocular magnification X objective magnification
Working distance - correct answers✔✔space between slide and lens
As magnification increases field of view.... - correct answers✔✔decreases
Resolution - correct answers✔✔clarity of an image produced by a set of lenses
Resolving power - correct answers✔✔ability of a lens to separate tow objects in a
microscopic field
Function of wavelength of light and a property of the lens called numerical aperture
Numerical aperture - correct answers✔✔mathematical expression that describes the
ability of the condenser lens to concentrate light rays from the light source
Some refracted light is always lost
