1The metabolites of yogurt culture cause the pH to: Select one: a. Stabilize b.

Question

1The metabolites of yogurt culture cause the pH to: Select one:

a. Stabilize

b. Not change at all

c. Strongly increase

d. Decrease

e. Increase

2 In the Enterotube II, The alpha-Naphthol reagent is used for which test? Select one:

a. PA

b. Dulcito

l c. Citrate

d. Lysine e. VP

3.In the Enterotube II, if your VP test has a red result this indicates: Select one: a. Sulfur reduction

b. Citrate utilization

c. Glucose fermentation

d. Urea hydrolyzation

e. Acetoin production

4. Lab exercise 8-5: If a patient has blood type O+, which of the following is likely true?

Select one:

a. Rh antigen is present

b. Rh antibodies are present

c. O antigen is present

d. B antigen is present

e. A antigen is presen

Lab exercise 8-5: Which of the following statements is NOT true?

Select one:

a. Type AB+ patients have no A, B, or Rh antibodies

b. The agglutination reaction can be performed on a slide

c. AB and Rh are the only antigens on RBCs

d. Type O+ blood is the most common in the U.S.

e. Anti-Rh antibodies are also called anti-D antibodies

Explanation / Answer

1) Yogurt is made by the fermentation of milk with bacteria Streptococcus thermophillus and Lactobacillus delbrueckii. They produce lactic acid as one of their metabolites. Therefore, pH of the culture decreases. So, the answer for this question is option d (decrease).

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