44. Which media/tests can be used to exhibit gas production? Citrate PRG TSI A and B...

44. Which media/tests can be used to exhibit gas production?

Citrate
PRG
TSI
A and B
B and C

Expert Solution

44. Answer - B and C

PRG and TSI media/tests can be used to exhibit gas production.

Reason - TSI (Triple Sugar Iron) media contains three sugars- lactose, sucrose, dextrose and ferrous sulfate, peptone as well as a pH indicator phenol red. If the bacteria uses any of the three sugars, then the media will turn yellow. The colour change is due to carbohydrate fermentation that leads to acidification of the medium and phenol red acts as an pH indicator. If the bacteria reduces sulfur, then H2S (hydrogen sulfide) gas will be produced that can be seen as a black precipitation. Because the H2S reacts with iron and iron sulfide is formed. Moreover, the CO2 and H2S gas production by the organism can be concluded through the cracks or bubbles in the medium or through the raising of the slant or media from the bottom surface.

PRG (Phenol Red Glucose) media contains glucose and phenol red. The fermetaion of glucose change the colour of the medium from red to blue. If there is gas production, buubles will appear upon inverting Durham tube. A smaller test tube is inserted upside down in another test tube. The bubbles are trapped inside the smaller tube.

Citrate media contains sodium citrate and bromothymol blue as a pH indicator. This test is used to examine the ability of a bacteria to utilize citatre. The citrate-negative bacteria can also grow on this media as inorganic salts are also present as nitrogen source. If bacteria utilizes citrate, then growth along with colour change will appear. The green colour media turns to blue.

gladiator answered 1 year ago

Which statistical tests would be used to determine statistical significance, and which statistical tests would be...

Which statistical tests would be used to determine statistical significance, and which statistical tests would be used to determine the variance from a population mean? Give a brief description of their key differences.

Q1 Which of the following are NOT tests which are used to assess the performance of...

Q1 Which of the following are NOT tests which are used to assess the performance of astabilization or solidification process? a. corrosion test b. EP TOX c. paint filter test d. TCLP Q2 Given that you receive a dose of radiation of 1 milli-rad, the highest tissue damage wouldresult if the radiation adsorbed was in the form of: a. Alpha b. Beta c. Gamma d. X-rays e. all the same Q3 When a radioactive isotope decays by emission of an...

. Under what conditions on a and b do the following production functions exhibit decreasing, increasing...

. Under what conditions on a and b do the following production functions exhibit decreasing, increasing or constant returns to scale? Mathematically justify and show your work. a. Q(L,K) = aL + bK b. Q(L,K) = (La + Ka ) 1/b

Biochemical and differential tests can be incorporated into growth media or performed on isolated colonies after...

Biochemical and differential tests can be incorporated into growth media or performed on isolated colonies after they have been cultured. Give three examples of a differential test that is incorporated into media and three examples that are applied after the colonies have been cultured.

Which of the following production techs will exhibit a well-behaved solution to profit maximization that satisfies...

Which of the following production techs will exhibit a well-behaved solution to profit maximization that satisfies both the first and second order conditions in the short run when capital is fixed at some positive level? 1) q = f(K, L) = K^2 + ln(L) 2) q = f(K, L) = 2K + (1/2)L 3) q = f(K, L) = min (ln(K), ln(L)) 4) q = f(K, L) = KL^2

Briefly describe how tests detecting amino acid catabolizing enzymes, and fermentation tests can be used to...

Briefly describe how tests detecting amino acid catabolizing enzymes, and fermentation tests can be used to identify microorganisms in the laboratory.

Consider the following costs: (A) Safety tests for a future production type (B) Fines for releasing...

Consider the following costs: (A) Safety tests for a future production type (B) Fines for releasing toxic chemicals into the ocean (C) Employee health and safety problems arising from a leak in a chemical plant (D) Temperature monitoring systems in a heating vat, to ensure employees are working in safe conditions. (E) Fines for breaching occupational health and safety standards for employees. (F) Fines for breaching environmental emission levels from plant operations. Required Identify and explain the environmental cost type...

Which Social Media Platform/Apps can be used to leverage your personal brand? How might you use...

Which Social Media Platform/Apps can be used to leverage your personal brand? How might you use three different social media platforms/apps to add to your digital portfolio and enhance your web presence. please write it down over 300 words

4. which of the following is most likely to exhibit covalent bonding a. MgCl2 b. NaCl...

4. which of the following is most likely to exhibit covalent bonding a. MgCl2 b. NaCl c. OCs2 d. SO2 e. LiF it is either c or d not sure which is most covalent

Dichotomous key showing which selective media and biochemical tests you would need if you were to...

Dichotomous key showing which selective media and biochemical tests you would need if you were to test your unknown bacteria: Providencia stuartii. Please explain the procedure on how you would use biochemical tests and selective media to ID the specific bacteria.

Question