Which of the following is considered a positive result on a lipase agar plate?

A SIM tube is inoculated. Following incubation and the addition of appropriate reagents, the tube has a black precipitate throughout the entire tube and a yellow ring at the top of the tube. What are the correct results for this test?

Smear prep, including heat fixation, is performed prior to all of the following except the 

When performing the 3-zone streak plate method, isolated colonies should be obtained in zone

Which of the following microscopes has the best resolution? Microscope A: wavelength = 400 nm, NA = 4 Microscope B: wavelength = 200 nm, NA = 1

Charles Deslondes

Which of the following has the correct order of the Gram stain reagents?

A bacterial sample is stained using the simple stain method. Following staining, round cells arranged in chains are seen under the microscope. Which of the following morphologies and arrangements match this description?

Molten agar is used in the 

Calculate the total magnification when viewing a sample using a 60X objective lens if the oculars have a 10X magnification.