Exam 3: Tools of the Laboratory: Methods of Studying Microorganisms

If a microbiologist is studying a specimen at a total magnification of 950X, what is the magnifying power of the objective lens if the ocular lens is 10X?

Which of the following media is useful for cultivating fungi?

Fixed smears of specimens are required in order to perform the Gram stain and endospore stain on the specimens.

_____ is the term for a culture made from one isolated colony.

Which method often results in colonies developing down throughout the agar and some colonies on the surface?

Identification relies entirely on biochemical test results.

Which of the following is essential for development of discrete, isolated colonies?

One colony typically develops from the growth of several parent bacterial cells.

A microbiologist makes a fixed smear of bacterial cells and stains them with Loeffler's methylene blue.All the cells appear blue under the oil lens.This is an example of

Magnification is achieved in a compound microscope through the initial magnification of the specimen by the _____ lens.This image is then projected to the _____ lens that will further magnify the specimen to form a virtual image received by the eye.

A microbiologist inoculates Staphylococcus aureus into a culture medium.Following incubation, both Staphylococcus aureus and Staphylococcus epidermidis are determined to be growing in this culture.What is the most likely explanation?

Observing and characterizing colonial growth for size, shape, edge, elevation, color, odor, and texture is part of ___.

Media that contains extracts from plants, animals, or yeasts are

Sally had a throat sample taken at a satellite lab within her health care provider's office.What kind of media would be best suited for this specimen?

Some microbes are not capable of growing on artificial media.

The Six I's of studying microorganisms include all of the following except

Mixed cultures are also referred to as contaminated cultures.

A reducing medium contains

The term that refers to the purposeful addition of microorganisms into a laboratory nutrient medium is

_____ has the same optical qualities as glass and thus prevents refractive loss of light as it passes from the slide to the objective lens.