Homework Answers
Answer 1:
Option - gas
In lactose or glucose broth, inverted Durham's tube is placed to catch any gas released during the fermentation of sugars. Air bubble in the tube is indicative of gas. Acid production is observed by change in the color of the medium to yellow due to phenol red indicator.
Answer 2: False
SIM agar stands for Sulphur, Indole, Motility.
Answer 3: True
Citrate differentiates between organisms that can utililize sodium citrate as sole source of carbon and energy from those who cannot.
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Microbiology
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A Durham tube is commonly added to the lactose or glucose broth...
Microbiology Q1 Q2 Q3 A phenol red glucose broth with a Durham tube has been inoculated...
Microbiology
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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
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 One organism that is positive for citrate is You added methyl red...
Microbiology
Q1
Q2
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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 answer 1 2 3 4 5 6 7 8 9 10 11 12 13...
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Salmonella is associated with the handling of contaminated beef True False Escherichia coli is a red-pigmented organism. True O False The results of the MR-VP test can be directly read from the test without the addition of any other chemicals. True False Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and...
Microbiology Q1 Q2 Q3 A“positive” lactose test is yellow. What is present in the medium that...
Microbiology
Q1
Q2
Q3
A“positive” lactose test is yellow. What is present in the medium that causes the color change? The only organism that is positive for indole is The only organism that is positive for hydrogen sulfide production is
Microbiology Q1 Q2 Q3 What is the color of SIM medium that contains an organism that...
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 Which reagent(s) are used to perform the EMB test? What is the...
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
Microbiology Q1 Q2 Q3 Salmonella is associated with the handling of contaminated beef True False Which...
Microbiology
Q1
Q2
Q3
Salmonella is associated with the handling of contaminated beef True False Which test(s) would you use to find out more about Gram-positive organisms? SIM O MR Citrate None of the tests listed. Fermentation of sugars usually results in end products. Acidic Basic (Alkaline)
Microbiology - Gram Positive (ONLY answer) [Q1] Mannitol salt agar is both selective and differential. -...
Microbiology - Gram Positive (ONLY answer) [Q1] Mannitol salt agar is both selective and differential. - True - False [Q2] Mueller Hinton medium is a selective and differential medium. - True - False [Q3] 6.5% Salt broth is used to distinguish - Streptococci and Enterococci - Streptococci and Staphylococci - E. coli and Salmonella - Enterobacter and Streptococci
Microbiology ONLY answe 1 2 3 4 5 6 Which reagent is added to test for...
Microbiology
ONLY answe
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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
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
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 answer
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Salmonella is associated with the handling of contaminated beef True False Escherichia coli is a red-pigmented organism. True O False The results of the MR-VP test can be directly read from the test without the addition of any other chemicals. True False Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and...
Microbiology
Q1
Q2
Q3
A“positive” lactose test is yellow. What is present in the medium that causes the color change? The only organism that is positive for indole is The only organism that is positive for hydrogen sulfide production is
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
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
Microbiology
Q1
Q2
Q3
Salmonella is associated with the handling of contaminated beef True False Which test(s) would you use to find out more about Gram-positive organisms? SIM O MR Citrate None of the tests listed. Fermentation of sugars usually results in end products. Acidic Basic (Alkaline)
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....
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