What is the purpose of including the pH indicator phenol red in Mannitol Salt Agar (MSA)

What is the purpose of including the pH indicator phenol red in Mannitol Salt Agar (MSA)

Expert Solution

gladiator answered 1 year ago

Phenol red, a pH indicator, is used in the experiment to determine respiration activity by showing...

Phenol red, a pH indicator, is used in the experiment to determine respiration activity by showing CO2 production. Table: CO2 Production by Beans Beans Indicator Color (Phenol Red) Conclusion (CO2 present or absent) Germinating Yellow Present Ungerminated-dry Red Absent Questions; 1. How does phenol red work as a pH indicator? 2. Why does this show respiration activity?

Mix the watery environment of Elodea with a pH indicator called phenol red. In the presence...

Mix the watery environment of Elodea with a pH indicator called phenol red. In the presence of an acid, phenol red will appear yellow. In the presence of a strong base, phenol red will appear purple. Intermediate colors correspond with intermediate pH values. Recall that plants use CO2 for photosynthesis; the concentration of CO2 will determine the pH of a solution. Plants also produce CO2 as a byproduct of cellular respiration. Will a solution with a high concentration of CO2...

Please write a brief description of each type of agar (MacConkey's, Tryptic Soy Agar, Mannitol Salt...

Please write a brief description of each type of agar (MacConkey's, Tryptic Soy Agar, Mannitol Salt Agar, and Blood Agar) and it's purpose (what is in it, why? and what type of bacteria are cultured with it when do you use each type?)

1.what kind of medium is Mannitol Salts Agar (MSA) a) neither selective nor differential b)differential c)selective...

1.what kind of medium is Mannitol Salts Agar (MSA) a) neither selective nor differential b)differential c)selective d)both selective and differential 2.which of the following is the best method to distinguish Bacillus megaterium from Bacillus Subtilis? a)use mannitol phenol red b)streak a MacConkey plate c)perform an endospore stain d) perform a gram stain

What can cause a phenol red indicator of carbohydrate fermentation to give a false positive with...

What can cause a phenol red indicator of carbohydrate fermentation to give a false positive with gas? I heavily incubated my organism in the test tube and it is producing a huge gas bubble in the Durham tube and a clear yellow (acid) color. I incubated my tube at my organism's optimism growth conditions (oxygen and temperature wise) for 48 hrs exactly.. i was supposed to get a red no gas result ( -) what might have gone wrong?

4a. Describe why the EMB, Hektoen Enteric and Mannitol Salt agar are selective. Include specific selective...

4a. Describe why the EMB, Hektoen Enteric and Mannitol Salt agar are selective. Include specific selective ingredients added to each media and what organisms these media select for and against. 4b. Describe why the EMB, Hektoen Enteric and Mannitol Salt agar are differential. Include specific differential ingredients added to each media and which types of organisms produce positive differential results.

What is the purpose of using blood agar? What are hemolysins? What are the three patterns...

What is the purpose of using blood agar? What are hemolysins? What are the three patterns of hemolysis on blood agar? Compare and contrast alpha, beta, and gamma hemolysis. What are the hemolytic patterns for a normal throat culture? What are the hemolytic patterns for Streptococcus pneumoniae and Streptococcus pyogenes?

What will happen in a phenol red test if you incubate an obligate aerobe with glucose...

What will happen in a phenol red test if you incubate an obligate aerobe with glucose as the fermentable sugar? What is the substrate for the catalase enzyme? What do you detect if the catalase test is positive? Why doesn't the iodine react with starch in the agar surrounding an organism that produces amylase?

Experiment "preparation and standardization of NaOH solution" What is the purpose of an indicator soltion? What...

Experiment "preparation and standardization of NaOH solution" What is the purpose of an indicator soltion? What does standardization mean? why does the NaOH solution have to be standardized??? Calculae ho many grams of solid NaOH are needed to prepare 500mL NaOH solution with a concentration of 0.4M (show work)

For your indicator, what is the wavelength of maximum absorbance for the pH < 4.00 solution?...

For your indicator, what is the wavelength of maximum absorbance for the pH < 4.00 solution? What is the wavelength of maximum absorbance for the pH > 10.00 solution? What colors correspond to these wavelengths? How do the observed colors of these solutions relate to the colors at their absorbance maxima? This is the procedure: http://www3.chem21labs.com/labfiles/UofC_GL18_Lab.pdf?rf=5204

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