GCSU Microbiology
Microbiology Lab Final - GCSU BACHOON
Exam Study Questions with Detailed
Solutions Top Graded 2026
microbes
According to health care experts, infectious diseases caused by ______________
are responsible for more deaths worldwide than any other single cause.
contaminants
Adequate precautions are necessary to prevent unwanted _________________
from getting in or on experimental tubes or plates.
Flame the inoculating loop
What is the first step of aseptic technique?
mix up organisms in culture
What is the second step of aseptic technique?
flame the mouth of the tube
What is the third step of aseptic technique?
remove organisms from tube using the inoculating loop.
What is the fourth step of aseptic technique?
remove loop from culture and flame the mouth of the tube and close the tube
What is the fifth step of aseptic technique?
transfer the loopful of bacteria to a test tube or Petri plate
GCSU Microbiology
,GCSU Microbiology
What is the 6th step of aseptic technique?
After transferring, flame the loop
What is the seventh step of aseptic technique?
E. coli
What bacteria did we use in the Aseptic Technique lab (Exercise 2)?
Base
used in carrying the microscope; houses the light source
light source
provides illumination to specimen
arm
along with the base, used as a carrying handle for the microscope
stage
platform which the specimen rests on
course and fine adjustment knobs
controls the distance between the specimen and the stage
coarse focus
is used with scan and low power objective lenses
fine focus
is used with high dry and oil immersion objective lenses
mechanical stage adjusters
GCSU Microbiology
, GCSU Microbiology
allow the movement of the stage from left to right and forward to backward
condenser
collects and concentrates light emitted from the light sources into a tight beam
before passing it through the specimen
iris diaphragm
located within the condenser; tightens or widens the beam of light emitted from the
condenser
light intensity adjuster
controls the amount of light emitted from the source bulb
objective lenses
serve to magnify the specimen in part
scanning power
4x magnification
low power
10x magnification
high dry power
40x magnification
oil immersion
100x magnification
revolving nosepiece
GCSU Microbiology
Microbiology Lab Final - GCSU BACHOON
Exam Study Questions with Detailed
Solutions Top Graded 2026
microbes
According to health care experts, infectious diseases caused by ______________
are responsible for more deaths worldwide than any other single cause.
contaminants
Adequate precautions are necessary to prevent unwanted _________________
from getting in or on experimental tubes or plates.
Flame the inoculating loop
What is the first step of aseptic technique?
mix up organisms in culture
What is the second step of aseptic technique?
flame the mouth of the tube
What is the third step of aseptic technique?
remove organisms from tube using the inoculating loop.
What is the fourth step of aseptic technique?
remove loop from culture and flame the mouth of the tube and close the tube
What is the fifth step of aseptic technique?
transfer the loopful of bacteria to a test tube or Petri plate
GCSU Microbiology
,GCSU Microbiology
What is the 6th step of aseptic technique?
After transferring, flame the loop
What is the seventh step of aseptic technique?
E. coli
What bacteria did we use in the Aseptic Technique lab (Exercise 2)?
Base
used in carrying the microscope; houses the light source
light source
provides illumination to specimen
arm
along with the base, used as a carrying handle for the microscope
stage
platform which the specimen rests on
course and fine adjustment knobs
controls the distance between the specimen and the stage
coarse focus
is used with scan and low power objective lenses
fine focus
is used with high dry and oil immersion objective lenses
mechanical stage adjusters
GCSU Microbiology
, GCSU Microbiology
allow the movement of the stage from left to right and forward to backward
condenser
collects and concentrates light emitted from the light sources into a tight beam
before passing it through the specimen
iris diaphragm
located within the condenser; tightens or widens the beam of light emitted from the
condenser
light intensity adjuster
controls the amount of light emitted from the source bulb
objective lenses
serve to magnify the specimen in part
scanning power
4x magnification
low power
10x magnification
high dry power
40x magnification
oil immersion
100x magnification
revolving nosepiece
GCSU Microbiology
