4/27/25, 9:56
AM
BIOS 242 Lab Practical EXAM QUESTIONS AND ANSWERS
LATEST UPDATE GRADED A++
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Practice questions for this set
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do you need oil immersion for eukaryotes?
Select the correct term
no because eukaryotes are so big you do no because eukaryotes are too small to be
1not need to magnify them beyond 40x 2seen without oil immersion
yes because eukaryotes require higher
yes because oil immersion is necessary for
3magnification to be visible under a microscope
4all types of cells regardless of size
Don't know?
Terms in this set (85)
1/
7
, 4/27/25, 9:56
AM
S. marcescens can grow aerobically and anaerobically
To prevent why is proper aseptic technique important?
contamination from
outside sources
heats it up to the whats the point of flaming the inoculating loop?
point that if there
was any bacteria it
would be killed
it might kill the what happens if you put the hot loop into the
bacteria you are tube too soon?
trying to retrieve
to penetrate the why do you stab the agar?
agar to allow for
bacteria to grow
anaerobically
breakout of a disease what happens if there is a breakdown in aseptic
technique?
circular shape of s. marcescens
circular shape of e. coli
umbonate elevation of s. marcescens
limit the number of why do you streak the four quadrants?
bacteria in each
quadrant (isolate
colonies)
total magnification magnification of objective lens x magnification
of ocular lens
200x 20x objective and 10x eyepiece
750x 50x objective x 15x eyepiece
carbolfuchsin acid fast primary stain
acid fast stain used for organisms that don't stain well with
gram due to the waxy outer layer
increased what does increasing magnification do to field
magnification of vision?
decreases field of
vision
more light is why is oil immersion necessary at 100x?
2/
7
AM
BIOS 242 Lab Practical EXAM QUESTIONS AND ANSWERS
LATEST UPDATE GRADED A++
Leave the first rating
Save
Practice questions for this set
Learn 1/7 Study using Learn
do you need oil immersion for eukaryotes?
Select the correct term
no because eukaryotes are so big you do no because eukaryotes are too small to be
1not need to magnify them beyond 40x 2seen without oil immersion
yes because eukaryotes require higher
yes because oil immersion is necessary for
3magnification to be visible under a microscope
4all types of cells regardless of size
Don't know?
Terms in this set (85)
1/
7
, 4/27/25, 9:56
AM
S. marcescens can grow aerobically and anaerobically
To prevent why is proper aseptic technique important?
contamination from
outside sources
heats it up to the whats the point of flaming the inoculating loop?
point that if there
was any bacteria it
would be killed
it might kill the what happens if you put the hot loop into the
bacteria you are tube too soon?
trying to retrieve
to penetrate the why do you stab the agar?
agar to allow for
bacteria to grow
anaerobically
breakout of a disease what happens if there is a breakdown in aseptic
technique?
circular shape of s. marcescens
circular shape of e. coli
umbonate elevation of s. marcescens
limit the number of why do you streak the four quadrants?
bacteria in each
quadrant (isolate
colonies)
total magnification magnification of objective lens x magnification
of ocular lens
200x 20x objective and 10x eyepiece
750x 50x objective x 15x eyepiece
carbolfuchsin acid fast primary stain
acid fast stain used for organisms that don't stain well with
gram due to the waxy outer layer
increased what does increasing magnification do to field
magnification of vision?
decreases field of
vision
more light is why is oil immersion necessary at 100x?
2/
7
