BIOD 171 Essential
Microbiology Portage Learning
Module 3 2026 Actual exam
questions and answers
(accurate solutions) latest!!
Does phase contrast microscopy require staining? - ANSWER ✔✔No
Simple staining is used mostly for... - ANSWER ✔✔A quick observance
Simple staining uses __________ dye. - ANSWER ✔✔Positively charged
Acid fast stain is used for... - ANSWER ✔✔bacteria resistant to
traditional staining; mostly for mycobacterium tuberculosis
, Resolution - ANSWER ✔✔distance between two objects at which the
objects can still be seen as separate
Contrast - ANSWER ✔✔difference in light absorbance between 2
areas
Dark field microscopy light - ANSWER ✔✔reflects light off of
specimen at an angle
Can you see intracellular structures with a dark field microscope? -
ANSWER ✔✔No
What microscope can capture in 3-D? - ANSWER ✔✔Confocal
What are the two types of electron microscopes? - ANSWER
✔✔transmission electron microscope (TEM) and scanning electron
microscope (SEM)
What is the difference between TEM and SEM? - ANSWER ✔✔TEM
passes through the sample, SEM reflects off the surface
Gram staining was developed by - ANSWER ✔✔Hans Christian Gram
in 1884
Microbiology Portage Learning
Module 3 2026 Actual exam
questions and answers
(accurate solutions) latest!!
Does phase contrast microscopy require staining? - ANSWER ✔✔No
Simple staining is used mostly for... - ANSWER ✔✔A quick observance
Simple staining uses __________ dye. - ANSWER ✔✔Positively charged
Acid fast stain is used for... - ANSWER ✔✔bacteria resistant to
traditional staining; mostly for mycobacterium tuberculosis
, Resolution - ANSWER ✔✔distance between two objects at which the
objects can still be seen as separate
Contrast - ANSWER ✔✔difference in light absorbance between 2
areas
Dark field microscopy light - ANSWER ✔✔reflects light off of
specimen at an angle
Can you see intracellular structures with a dark field microscope? -
ANSWER ✔✔No
What microscope can capture in 3-D? - ANSWER ✔✔Confocal
What are the two types of electron microscopes? - ANSWER
✔✔transmission electron microscope (TEM) and scanning electron
microscope (SEM)
What is the difference between TEM and SEM? - ANSWER ✔✔TEM
passes through the sample, SEM reflects off the surface
Gram staining was developed by - ANSWER ✔✔Hans Christian Gram
in 1884
