Adding Iodine To A Cup Of Pda Essay Example

possible explanation as to why the oxides test identifies the presence of stockroom c oxides and not other oxides. - The purpose of the oxides test is to look for the existence of stockroom c oxides.

The test was not meant to look for the presence of other oxides. IF any other substance was present the test would come back negative. 2. How would you expect the results of the Starch Hydrolysis test to change if you were to add glucose to the medium? - I would expect the organism to change to bluish black color after adding iodine.

The glucose would turn into a starch after it is Rosen down. . For the Gelatins test, if the control is solid and an inoculated tube is liquid, is it acceptable to read the result before the complete incubation period has elapsed? Why or why not? -No, the tube must be incubated at 25 C. The liquid tube would be a positive test result and the solid would be negative.

4. For the Gelatins test, if the control is solid and a tube that has been inoculated is solid, is it acceptable to read the result before the complete incubation period has elapsed? Why or why not? -No the tubes must be incubated at ICC to get an accurate result.

The liquid is positive and the solid is negative. 5.

Suggest reasons why the Dense test is read after only 24 hours while other test (gelatins) may take up to a week. -The Dense test requires growth to be present and shouldn't need to be changed from a solid too liquid. 6. Why is it advisable to use a positive

control when testing unknown organisms? -It is advisable to use a positive control to verify your conditions were correct. 7. Virtually all sulfur-reducing members of Interchangeable are motile.

Suppose Mennonite. After completing all aspects of the test, what would you expect the result o look like? After this, I would expect the results to have a white fuzzy growth. I would also expect a pinkish color to form around the top. 8. How would you expect to change the result of a SIMI test if you eliminated the sodium tessellate? Or the ferrous ammonium sulfate? -l would expect that the test would be inaccurate because it would not have all elements it need to perform the test. 9.

For the coagulate test, how would you interpret a negative Slide Test and a positive Tube test using the same organism? -With a negative test result, I would look for a clear liquid.