MICROBIOLOGY LAB PRACTICAL EXAM 1|GEORGIA SOUTHERN UNIVERSITY BRAND NEW OFFICIAL QUESTIONS WITH ANSWERS.

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MICROBIOLOGY LAB PRACTICAL EXAM
1|GEORGIA SOUTHERN UNIVERSITY
BRAND NEW OFFICIAL QUESTIONS WITH
ANSWERS.



What can happen to a Gram stain if a smear is too heavy? -
correct answer -can't see cells




What happens to a Gram stain if a smear is too light.? - correct
answer -cells are scattered away or not enough




Flatworm - correct answer --has gastrovascular cavity, functions
as both mouth and anus
- locomotion involves gliding




Roundworms - correct answer --has a complete digestive tract,
separate openings for the mouth and anus

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How is biofilm formed - correct answer -- attaching and growing
on surface when exposed to water




Fermentation tubes - correct answer --detects acid and gases
from carbohydrates
-phenol red indicates alkaline
-yellow indicates acid production
-clear Durham tubes indicate gases




Methyl red test (M.R test) - correct answer -organisms make acid
from glucose
- red/orange is positive
-yellow is negative




Voges-Proskauer (VP test) - correct answer --organisms utilizing
butylene glycol to make acetoin
-red color on top is a positive




Citrate test - correct answer -- organism use it for carbon &
energy.