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MIP 300 Final Exam Questions and Answers All Correct

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MIP 300 Final Exam Questions and Answers All Correct Which of the following are eukaryotic microbes? - Answer-A) Viruses B) Protozoa C) Bacteria D) Yeasts E) B and D (CORRECT) (True/False) Protozoa are considered "transitional" organisms because they may not contaon all the usual membrane...

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  • September 4, 2024
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MIP 300 Final Exam Questions and
Answers All Correct

Which of the following are eukaryotic microbes? - Answer-A) Viruses
B) Protozoa
C) Bacteria
D) Yeasts
E) B and D (CORRECT)

(True/False)
Protozoa are considered "transitional" organisms because they may not contaon all the
usual membrane-bound organelles you would expect to find in a eukaryotic cell -
Answer-True

You just landed a position as a Graduate Teaching Assistant in a microbiology
laboratory class and are grading laboratory notebooks. How would you grade this
student's lab book entry?
Streptococus Pyogenes - Answer-Incorrect, because the species name should be lower
case and because the student forgot to underline or italicize genus and species names

What kingdom are viruses classified in? - Answer-Monera, Virilae, Fungi, Anamalia

None of the above (CORRECT)- viruses are not classified in either the kingdom or the
domain systems

You have the opportunity to purchase a new microscope. Which of the scopes listed
below, all of which cost $2,000, will you get the most powerful microscope for you
money? - Answer-Resolving power= 1mm
Resolving power= 4um
Resolving power= 1um

Resolving power=0.4um (CORRECT)- this microscope will allow you to see the smallest
specimen, so it has the best resolving power

Resolvingpower=0.4mm

You perform an acid-fast stain on Mycobacterium tuberculosis are realize at the end
that you forgot to use heat/ What color will the cells be? - Answer-Colorless- heat is
needed to drive the pink stain(or any stain) past the mycolic acid layer. Without heat,
the primary pink stain will not penetrate and the cell will remain clear

,You discover a new bacterium. Its cell envelope shows high concentrations of
phosphatidylethanolmine and another type of phospholipid that is associated with long
polysaccharide chains of unusual sugars. This organism is likely? - Answer-Gram-
negative

Species can be broken down even further. What are different groupings within species
called in dogs? - Answer-Breeds

Species can be broken down even further. What are different groupings within species
called in cats? - Answer-Breeds

Bacterial axial filament stains will stain the cell - Answer-

Bacterial flagella stains will stain the cell - Answer-external to the cell wall

In eukaryotic cells, the function of ribosomes is - Answer-protein production

In bacteria, the function of ribosomes is - Answer-protein production

Which of the following types of microscope will allow you to visualize FITC- labeled
stained viruses that are infecting a cell - Answer-Fluorescent

Which of the following types of microscope will allow you to most readily visualize live
bacteria in a water sample without staining? - Answer-Phase Contrast

Which of the following types of microscope will allow you to visualize viruses inside a
cell? - Answer-Electron

Species can be broken down even further. What are different groupings within species
called in bacteria? - Answer-Strains

Species can be broken down even further. What are different groupings within species
called in fungi? - Answer-Strains

(True/False)
Viruses will have ribosomes - Answer-False

Species can be broken down even further. What are different groupings within species
called in humans? - Answer-Races

A differential stain - Answer-1) will stain some bacteria differently than other
2) is used to determine differences between cell structures
3) is used to give color to cells so they can easily be observed under a microscope
4) is used to selectively grow certain types of bacteria

, 5) 1 and 2 (CORRECT)

In an endospore stain, the positive cells will have which of the following appearances? -
Answer-Green spots within a red cell

Species can be broken down even further. What are different groupings within species
called in viruses? - Answer-Strains

What components of the peptidoglycan can be altered to change the thickness of a
Gram-Negative peptidoglycan layer? - Answer-The number of NAG and NAM sheets
(Gram0Negative bacteria don't have interbridges, only direct covalent linkage between
tetrapeptides, thus the number of NAG-NAM sheets is the only factor contributing to
varied thickness of the Gram-Ngative ppg)

What components of the peptidoglycan can be altered to change the thickness of a
Gram-Positive peptidoglycan layer? - Answer-A) the number of NAG and NAM sheets
B) the type of amino acids in the interbridge
C) the number of amino acids in the interbridge
D) A and B

E) A, B and C (CORRCT)
Gram-Positive can have different numbers of NAG-NAM sheets, and there can be
different types and different numbers of amino acids within the interbridges, all of which
alter the thickness of the ppg)

You do a Gram stain. You realize when you finish that you forgot to add Gram's Iodine.
What color will a Gram-Positive cell be at the end of staining? - Answer-Pink

Crystal violet is NOT retained within the thick ppg(since it isn't aggregated with the
mordant) upon the wash step, thus it will stain pink from the secondary stain

You isolate a cell and find that it has 70S ribosomes. This cell could be - Answer-
Prokaryote
Eukaryotes

Either Prokaryote or Eukaryote (CORREECT)

Because both cell types have 70S ribosomes. The prokaryote have only 70S
ribosomes. Eukaryotes, on the other hand, have 80S ribosomes that callry out the
majority of protein synthesis for the cell, but they also have 70S ribosomes in their
mitochondria and chloroplasts(endosymbiont theory)

(True/False)
Plasmids are not required for bacterial cell growth or reproduction - Answer-True

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