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BIO 255 Final Exam-Questions and Answers 100% Pass
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BIO 255 Final Exam-Questions and Answers 100% Pass
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BIO 255 Final Exam-Questions and Answers 100% PassYou inoculated a lysine decarboxylase tube and incubated it for 24 hours. After the incubation
period, you see turbidity and a yellow color. Is it positive or negative for what? Also, what
type of biochemical molecule is lysine (i.e. carbohydrate, lipid, etc Correct Ans-Negative
(0.5) for lysine decarboxylase (0.5 pt), Amino acid (1 pt)
You inoculated and incubated a Phenol Red (PR) Glucose tube with an unknown. If your
results end up with the medium being turbid, reddish orange, and no air pockets in the
Durham tube. What does the turbidity mean? Correct Ans-growth has occurred
You inoculated and incubated a Phenol Red (PR) Glucose tube with an unknown. If your
results end up with the medium being turbid, reddish orange, and no air pockets in the
Durham tube. What does the redish orange mean? Correct Ans-no acid production and no
gluclose
, BIO 255 Final Exam-Questions and Answers 100% Pass
You inoculated and incubated a Phenol Red (PR) Glucose tube with an unknown. If your
results end up with the medium being turbid, reddish orange, and no air pockets in the
Durham tube. What does the no air pockets mean? Correct Ans-no gas production
You stabbed the motility test medium using the inoculating needle with your unknown. What
would indicate that your unknown was motile? Correct Ans-Cloudiness in ALL directions
from the stab line
If your unknown was motile, give the 3 types of motility that it may have. Correct Ans-
Swimming (or Swarming), Gliding, Twitching
Requires 𝑂2 for growth Correct Ans-Obligate Aerobe
Facultative Anaerobe_ Correct Ans-Grows best in the presence of 𝑂2 but not essential
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