Question 37 Lysine Iron Agar Lia Is Another Example Of A Biochemical Test From Which We Can Gain Several Points Of Data 1 (19.01 KiB) Viewed 56 times
QUESTION 37 Lysine Iron Agar LIA is another example of a biochemical test from which we can gain several points of data from a single inoculation. This medium determines the ability of a bacterium to metabolize the amino acid lysine via deamination (removal of NH3 ) or decarboxylation (removal of CO₂). In addition, the medium can detect sulfur reduction (to H₂S) and glucose fermentation. Note that lysine decarboxylation can only occur if the medium is first acidified due to glucose fermentation. Fermentation is not, however, a prerequisite for lysine deamination. Sulfur reduction is independent of deamination, decarboxylation, and fermentation. Observe these tubes that were inoculated with a variety of bacteria, then answer the following questions:
Observe these tubes that were inoculated with a variety of bacteria, then answer the following questions: 198
A B B CONTROL Morton Publishing Company Which tube(s) demonstrate a positive result for sulfur reduction? Choose ALL correct answers: a. A b. c. None of the tubes demonstrate sulfur reduction QUESTION 38 Look at the image of Lysine Iron Agar from question 37. Which tube(s) demonstrate a positive result for lysine deamination? Choose ALL correct answers: a. A b. B Oc. None of the tubes demonstrate lysine deamination QUESTION 39 Look at the image of Lysine Iron Agar from question 37. Which tube(s) demonstrate a positive result for lysine decarboxylation? Choose ALL correct answers: a. A b. B c. None of the tubes demonstrate lysine decarboxylation QUESTION 40 Look at the image of Lysine Iron Agar in question 37. Which tube(s) demonstrate a positive result for glucose fermentation? Choose ALL correct answers: a. A b. c. None of the tubes demonstrate glucose fermentation B
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