A student performed a gram stain on a gram positive bacillus and obtained the stain shown below:     What is the explanation of these results?

What indicates a positive Voges-Proskauer test?

A microbe that only produces turbid broths in pH tests at pH 4 is considered a(n) _____.

The biochemical test, Methyl Red, was preformed on an unknown microbe.  The result was a color change from pale yellow to pink.  What conclusion can you make about this microbe?

Which of the following are permissible in an actual microbiology lab?

What is the difference between halophiles and halotolerant microbes?

A viable plate has a count of 125 colonies produced from 0.125 mL of a 10-4 dilution of the original sample. The original sample contains _____ CFU/mL.

The inoculation loop must be sterilized _____ when creating a streak plate.  Check all that apply.

After using loops, swabs, toothpicks, spreaders or any other equipment to transfer cultures, immerse the contaminated equipment in ______.

After preforming a serial dilution to 105, the results  of the dilution plating were 45 colonies on the plate diluted to 105 . Calculate the CFU/ml of the original sample.  Remember to answer in scientific notation.