BIOL 250 LAB QUIZ #1 [EXP. #1, 2, 3, 5, &
6] ASSESSMENT FULLY RESOLVED
- answer ✔✔-EXP. #1:
Procedures that prevent microbes from getting where they do not belong (contamination). This
includes microbes from the environment contami- nating your lab area as well as any microbes
under study contaminating you or your work area. - answer ✔✔-Aseptic technique
Specially prepared blotting paper that contains a minimum of loose paper fibers. - answer ✔✔-
Bibulous paper
with a true nucleus and paired chromosomes. - answer ✔✔-Eukaryotic Cells
Feature of most microscopes that sets the focal point of all objective lenses at the same location
in space - answer ✔✔-Parfocal
with no true nucleus (membrane covered, paired chromosomes), with only one circular
chromosome. - answer ✔✔-Prokaryotic Cells
The ability to see a small object clearly under the microscope (technically, minimal distance at
which two adjacent small objects can be distinguished as separate). - answer ✔✔-Resolution
, Device that controls the amount of electrical current and thus the amount of light emanating
from a bulb. - answer ✔✔-Rheostat
- answer ✔✔-EXP. #2:
Solidifying agent used for growth media derived from seaweed. - answer ✔✔-Agar
Growth medium in a test tube allowed to solidify as the tube sits in a test-tube rack. - answer
✔✔-Agar deep
Solidified growth medium in a lid-covered, flat dish. - answer ✔✔-Agar plate
Solidified growth medium in a test tube, allowed to solidify at an angle, thus presenting a large
surface area to allow for growth. - answer ✔✔-Agar slant
Device that uses pressurized (15 lbs/in2) steam at 121°C to kill all known infectious agents in 15
minutes. - answer ✔✔-Autoclave
General term for liquid growth medium. - answer ✔✔-Broth
A visible clump of bacteria growing on an agar plate, separated from other areas of growth. -
answer ✔✔-Colony
Presence or possible presence of mi- crobes in an area where they do not belong. - answer ✔✔-
Contamination
(In the laboratory) allowing a microbe to grow at a constant (usually optimal) temperature. -
answer ✔✔-Incubation
6] ASSESSMENT FULLY RESOLVED
- answer ✔✔-EXP. #1:
Procedures that prevent microbes from getting where they do not belong (contamination). This
includes microbes from the environment contami- nating your lab area as well as any microbes
under study contaminating you or your work area. - answer ✔✔-Aseptic technique
Specially prepared blotting paper that contains a minimum of loose paper fibers. - answer ✔✔-
Bibulous paper
with a true nucleus and paired chromosomes. - answer ✔✔-Eukaryotic Cells
Feature of most microscopes that sets the focal point of all objective lenses at the same location
in space - answer ✔✔-Parfocal
with no true nucleus (membrane covered, paired chromosomes), with only one circular
chromosome. - answer ✔✔-Prokaryotic Cells
The ability to see a small object clearly under the microscope (technically, minimal distance at
which two adjacent small objects can be distinguished as separate). - answer ✔✔-Resolution
, Device that controls the amount of electrical current and thus the amount of light emanating
from a bulb. - answer ✔✔-Rheostat
- answer ✔✔-EXP. #2:
Solidifying agent used for growth media derived from seaweed. - answer ✔✔-Agar
Growth medium in a test tube allowed to solidify as the tube sits in a test-tube rack. - answer
✔✔-Agar deep
Solidified growth medium in a lid-covered, flat dish. - answer ✔✔-Agar plate
Solidified growth medium in a test tube, allowed to solidify at an angle, thus presenting a large
surface area to allow for growth. - answer ✔✔-Agar slant
Device that uses pressurized (15 lbs/in2) steam at 121°C to kill all known infectious agents in 15
minutes. - answer ✔✔-Autoclave
General term for liquid growth medium. - answer ✔✔-Broth
A visible clump of bacteria growing on an agar plate, separated from other areas of growth. -
answer ✔✔-Colony
Presence or possible presence of mi- crobes in an area where they do not belong. - answer ✔✔-
Contamination
(In the laboratory) allowing a microbe to grow at a constant (usually optimal) temperature. -
answer ✔✔-Incubation
