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QUESTIONS: 1. In the previous lab we used another red pH indicator, phenol red. Compare the colors of phenol red and methyl red at neutral and acidic conditions. 2. What is the difference between a selective medium and a differential medium? 3. Explain why Levine EMB is considered a selective medium but Luisetti's is not. 4. Use + or - to fill in this chart on the differences between E. coli and Enterobacter aerogenes Organism Indole Methyl Red Voges Proskauer Citrate E. coli Enterobacter aerogenes

          QUESTIONS:
1. In the previous lab we used another red pH indicator, phenol red. Compare the colors of phenol red and methyl red at neutral and acidic conditions.
2. What is the difference between a selective medium and a differential medium?
3. Explain why Levine EMB is considered a selective medium but Luisetti's is not.
4. Use + or - to fill in this chart on the differences between E. coli and Enterobacter aerogenes
Organism Indole Methyl Red Voges Proskauer Citrate
E. coli
Enterobacter aerogenes

Show more…

QUESTIONS:
1. In the previous lab we used another red pH indicator, phenol red. Compare the colors of phenol red and methyl red at neutral and acidic conditions.
2. What is the difference between a selective medium and a differential medium?
3. Explain why Levine EMB is considered a selective medium but Luisetti's is not.
4. Use + or - to fill in this chart on the differences between E. coli and Enterobacter aerogenes
Organism Indole Methyl Red Voges Proskauer Citrate
E. coli
Enterobacter aerogenes

Added by Andrew C.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

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Solved by Expert Madhur L

Step 1

Comparing the colors of phenol red and methyl red at neutral and acidic conditions: Phenol red is yellow at acidic pH (below 6.8), red at neutral pH (6.8-8.2), and pink at alkaline pH (above 8.2). Methyl red is red at acidic pH (below 4.4), yellow at neutral pH Show more…

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In the previous lab we used another red pH indicator, phenol red. Compare the colors of phenol red and methyl red at neutral and acidic conditions. What is the difference between a selective medium and a differential medium? Explain why Levine EMB is considered a selective medium but Luisetti's is not. Use + or - to fill in this chart on the differences between E. coli and Enterobacter aerogenes. Organism Indole Methyl Red Voges Proskauer Citrate E. coli Enterobacter aerogenes

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