Homework Answers
1. In a lactose broth most commonly used is phenol red and also 0.5% lactose in added. The media remains red in colour at neutral pH but turns into yellow colour when pH decreases and turns hot pink colour when pH increases.
2. Proteus mirabilis is positive for indole.
3. Proteus mirabilis is positive for H2S production test.
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Microbiology
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A“positive” lactose test is yellow. What is present in the medium that...
Microbiology Q1 Q2 Q3 What is the color of SIM medium that contains an organism that...
Microbiology
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Q3
What is the color of SIM medium that contains an organism that forms hydrogen sulfide (is positive for sulfur)? Blue Black Red Yellow Which test(s) would you use to find out more about Gram-positive organisms? SIM MR Citrate None of the tests listed. Fermentation of sugars usually results in end products. Acidic Basic (Alkaline)
Microbiology Q1 Q2 Q3 A phenol red glucose broth with a Durham tube has been inoculated...
Microbiology
Q1
Q2
Q3
A phenol red glucose broth with a Durham tube has been inoculated and incubated. After 48 hours, the broth is turbid and bright yellow and approximately half of the contents of the Durham tube contains bubbles. Interpret these results. The organism will ferment lactose as well. The organism is fermenting glucose. The organism is an obligate anaerobe. The organism is fermenting lactose and producing ethanol and CO2. What can be detected using SIM medium? Check all...
Microbiology Q1 Q2 Q3 Which medium contains a pH indicator to show pH change caused by...
Microbiology
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Q3
Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and Glucose Broths Lactose, Glucose, and SIM What is the Gram reaction of Escherichia coli? Positive Negative Gram Neutral It is an acid-fast organism. How do we test for gas production during glucose fermentation? The medium turns yellow. There is a bubble that collects in the Durham tube. The medium turns red. We cannot test for gas...
Microbiology Q1 Q2 Q3 A Durham tube is commonly added to the lactose or glucose broth...
Microbiology
Q1
Q2
Q3
A Durham tube is commonly added to the lactose or glucose broth to test for the release of Acid gas Both acid and gas SIM stands for sulfur, indole, and methyl red. True False The citrate slant is a differential medium. True False
Microbiology - Gram Positive (ONLY answer) [Q1] Which organism did not ferment mannitol? [Q2] We observe...
Microbiology - Gram Positive (ONLY answer) [Q1] Which organism did not ferment mannitol? [Q2] We observe color change on Mueller Hinton agar. (True/ False) [Q3] Which organism was resistant to novobiocin? [Q4] Your organism is catalase negative and produces a black precipiate on bile. What other test would likely be positive?
Microbiology Q1 Q2 Q3 One organism that is positive for citrate is You added methyl red...
Microbiology
Q1
Q2
Q3
One organism that is positive for citrate is You added methyl red to your MR test and observe a red color. The test result can be interpreted as You forgot to label a tube with a slant but you remember that its original color was green and now after incubation, the slant color is blue. What is the name of the test?
Microbiology ONLY answe 1 2 3 4 5 6 Which reagent is added to test for...
Microbiology
ONLY answe
1
2
3
4
5
6
Which reagent is added to test for indole? A“positive” lactose test is yellow. What is present in the medium that causes the color change? You added methyl red to your MR test and observe a red color. The test result can be interpreted as You forgot to label a tube with a slant but you remember that its original color was green and now after incubation, the slant color is blue....
Microbiology Q1 Q2 Q3 Which reagent(s) are used to perform the EMB test? What is the...
Microbiology
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Which reagent(s) are used to perform the EMB test? What is the color of a negative Methyl Red test? Pseudomonas is an opportunistic pathogen that commonly causes urinary tract infections. True False
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Microbiology - Gram Positive (ONLY answer) [Q1] A positive catalase test shows - Bubbles - Appearance...
Microbiology - Gram Positive (ONLY answer) [Q1] A positive catalase test shows - Bubbles - Appearance of Clots - Change of color from blue to green. - All answers are correct. [Q2] A complete blood cell lysis is also known as - Alpha hemolysis - Beta hemolysis - Gamma hemolysis - No answer text provided. [Q3] How do you know whether your organism completely lysed the blood cells? - By the presence of a green halo around the bacterial growth...
Microbiology
Q1
Q2
Q3
What is the color of SIM medium that contains an organism that forms hydrogen sulfide (is positive for sulfur)? Blue Black Red Yellow Which test(s) would you use to find out more about Gram-positive organisms? SIM MR Citrate None of the tests listed. Fermentation of sugars usually results in end products. Acidic Basic (Alkaline)
Microbiology
Q1
Q2
Q3
A phenol red glucose broth with a Durham tube has been inoculated and incubated. After 48 hours, the broth is turbid and bright yellow and approximately half of the contents of the Durham tube contains bubbles. Interpret these results. The organism will ferment lactose as well. The organism is fermenting glucose. The organism is an obligate anaerobe. The organism is fermenting lactose and producing ethanol and CO2. What can be detected using SIM medium? Check all...
Microbiology
Q1
Q2
Q3
Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and Glucose Broths Lactose, Glucose, and SIM What is the Gram reaction of Escherichia coli? Positive Negative Gram Neutral It is an acid-fast organism. How do we test for gas production during glucose fermentation? The medium turns yellow. There is a bubble that collects in the Durham tube. The medium turns red. We cannot test for gas...
Microbiology
Q1
Q2
Q3
A Durham tube is commonly added to the lactose or glucose broth to test for the release of Acid gas Both acid and gas SIM stands for sulfur, indole, and methyl red. True False The citrate slant is a differential medium. True False
Microbiology
Q1
Q2
Q3
One organism that is positive for citrate is You added methyl red to your MR test and observe a red color. The test result can be interpreted as You forgot to label a tube with a slant but you remember that its original color was green and now after incubation, the slant color is blue. What is the name of the test?
Microbiology
ONLY answe
1
2
3
4
5
6
Which reagent is added to test for indole? A“positive” lactose test is yellow. What is present in the medium that causes the color change? You added methyl red to your MR test and observe a red color. The test result can be interpreted as You forgot to label a tube with a slant but you remember that its original color was green and now after incubation, the slant color is blue....
Microbiology
Q1
Q2
Q3
Which reagent(s) are used to perform the EMB test? What is the color of a negative Methyl Red test? Pseudomonas is an opportunistic pathogen that commonly causes urinary tract infections. True False
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