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BIOS 260 Lab Exam: Questions and Answers 100% Pass
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BIOS 260 Lab Exam: Questions and Answers 100% Pass
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BIOS 260 Lab Exam: Questions and Answers 100% PassThe scan, 10X and 40X lenses and other parts of the microscope should not get any oil on
them. Correct Ans-True... this is very important
The stage should be moved down to add oil to the slide. Correct Ans-False
To remove the oil from the lenses, ______ should be used. Correct Ans-Lens paper
If you see rods under the microscope, the morphology is Correct Ans-bacillus
The name of the dye used in the negative stain is ________ and it is ________________.
Correct Ans-nigrosin, acidic
Bacteria have a ____________________________ surface. Correct Ans-negative charged
The negative staining technique is used to
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, BIOS 260 Lab Exam: Questions and Answers 100% Pass
a. determine morphology and cellular arrangement that are too delicate to withstand heat-
fixing
b. determine the accurate size since there is minimal cell shrinkage
c. identify acid-fast organisms
differentiate gram-negative organisms Correct Ans-A and B
If you look in the microscope and see chains of organisms, the prefix is termed _______.
Correct Ans-strepto
If you look in the microscope and see clusters of organisms, the prefix is termed ________.
Correct Ans-Staphylo
The dye we will use for the negative stain is called________, and it will stain the _____.
Correct Ans-nigrosin, background
If you see spheres under the microscope, the morphology of the bacteria is Correct Ans-
coccus
, BIOS 260 Lab Exam: Questions and Answers 100% Pass
If you see curved shaped organisms under the microscope, the morphology of the bacteria is
Correct Ans-spirals/spirillium
Purple organisms observed on a Gram stain are Correct Ans-Gram-positive
Red organisms observed on a Gram stain are Correct Ans-Gram-negative
The name of the decolorizer is Correct Ans-95% alcohol
The Gram stain is a(n) Correct Ans-differential stain
Red color is observed all throughout the growth medium in a motility test. Is this organism
motile? Correct Ans-Yes
Is an organism that remains along the stabline motile? Correct Ans-No
Motility test medium is inoculated with a Correct Ans-needle
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