Question

In: Biology

is it possible to have the following results? explain why or why not? A: tsia-yellow slant...

is it possible to have the following results? explain why or why not?
A: tsia-yellow slant and red butt?
B: tsia-yellow butt and blackening in the media?
C:litmus milk- clearing of fluid and breaks in the clot?
D: Litmus milk- blue color with an acid curd?
E:SIM- Motility and no black precipitate?

Solutions

Expert Solution

Ans. A In tsia yellow slant and red butt wont be observed. As it neither indicates the presence of gas nor the presence of H2S also non of the acid-acid, acid-alkali, alkali-alkali reaction coincides with the observation.

Ans B. Yellow butt and blackening of the media can be observed due to production of H2S gas and the black colouration would be due to the feroous sulfide formation.

Ans C. In litmus milk the reversal of the given procedure would occur. AS a result of which there would not be clearing of fluid and breaking into clot. On the contrary there would be digestion of casein and formation of clot.

Ans D. Litmus milk blue color with an acid curd. It cannot take place as the blue coluration would occur only in case of alkaline medium and not in acid medium. The acid curd is characterised by pink colouration due to lactose fermentation.

Ans E. It is possible due to reduction of H2S to ferrous sulphide. Hence the SIM motility and black precipitate can occur.


Related Solutions

What does a TSI tube with a red slant and a yellow buttom inducate? A yellow...
What does a TSI tube with a red slant and a yellow buttom inducate? A yellow slant and a yellow buttom indicate?
why is the slant height s = sqrt(2) - x . Please explain thoroughly how to find the slant height.
  why is the slant height s = sqrt(2) - x . Please explain thoroughly how to find the slant height. (Folding a pyramid) A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from 2 ft square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. What is the largest volume the pyramid can have? Hint: The volume...
Explain the TSI slant and explain the significance of the test.
Explain the TSI slant and explain the significance of the test.
describe and explain the possible effect on your results of the following experimental errors or vibrations....
describe and explain the possible effect on your results of the following experimental errors or vibrations. In each case, specify the component(s) whose percentage(s) would be too high or too low if: a.)After adding DCM to Panacetin, you didnt stir the mixture long enough. b.) during the NaOH extraction you failed to mix the aqueous and organic layers thoroughly c.)you mistakenly extracted the DCM solution with 1M HCL rather than 1M NaOH. d) instead of using pH paper, you acidify...
Describe and explain the possible effect on your TLC results of the following experimental errors or...
Describe and explain the possible effect on your TLC results of the following experimental errors or variations: a) The analyte spots are too large (b) The analyte solution is too dilute.
When a proton and anti-proton collide various results are possible. Order the following possible results, from...
When a proton and anti-proton collide various results are possible. Order the following possible results, from MOST TO LEAST LIKELY, given what you know about the relative strengths of the forces involved. Assume that the other particles not mentioned take care of making sure that all quantities that need to be conserved are conserved. A.) The final particles are only pions of various charges. B.) Various particles including a photon C.) Various particles including an electron, and an anti-electron neutrino...
explain in details why is it not possible to have 100% safety in case of disaster.
explain in details why is it not possible to have 100% safety in case of disaster.
why taxpayers must have insurance? please explain as much as possible
why taxpayers must have insurance? please explain as much as possible
Economists have estimated the following transportation elasticities. For each pair, explain possible reasons why the elasticities...
Economists have estimated the following transportation elasticities. For each pair, explain possible reasons why the elasticities differ. University of Richmond Professor Erik Craft analyzed the states’ pricing of vanity plates. He found that in California, where vanity plates cost $28.75, the elasticity of demand was 0.52. In Massachusetts, where vanity plates cost $50, the elasticity of demand was 3.52. a. Assuming vanity plates have zero production cost and his estimates are correct, was each state collecting the maximum revenue it...
Explain how each of the following errors would have altered your results. CLEARLY EXPALIN why your...
Explain how each of the following errors would have altered your results. CLEARLY EXPALIN why your calculations would be high, low, or unchanged. a. The pH buffers used to calibrate the pH meter were each 0.5 pH units high (4.5 and 7.5 rather than 4.0 and 7.0 respectively). b. You decided to take the pH after each addition of 5.0 mL of NaOH rather than after every 0.5 mL during the neutralization of your acid sample. c. While using the...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT