Chapter 6 and 4 Quiz Review

Question 1

What does a pure culture contain?
A.) only one species of microorganism
B.) only bacteria
C.) a variety of microbes from one source
D.) a variety of species from the same genus
E.) none of the choices are correct

Answer 1

A.) Only one species of microorganism.

Question 2

The term that refers to the purposeful addition of microorganisms into a lab nutrient is.
A.) isolation 
B.) inoculation 
C.) immunization 
D.) infection 
E.) contamination

Answer 2

B.) inoculation

Question 3

Agar is an important component of media because
A.) bacteria require agar to grow
B.) agar inhibits mold growth
C.) agar provide a solid surface for bacterial growth
D.) agar prevents contamination
E.) all of the choices are correct

Answer 3

C.) agar provides a solid surface for bacterial growth

Question 4

Which type of media is able to distinguish different species or types of microorganisms based on an observable change in the colonies or medium? 
A.) differential 
B.) selective 
C.) enumeration 
D.) enriched 
E.) reducing

Answer 4

A.) differential

Question 5

Magnification is achieved in a compound microscope through the initial magnification 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.) ocular; objective 
B.) scanning; objective 
C.) objective; ocular 
D.) ocular; oil 
E.) none of the choices are correct

Answer 5

C.) objective; ocular

Question 6

Which type of microscope is the most widely used and shows cells against a bright background? 
A.) bright field 
B.) dark field 
C.) phase contrast 
D.) fluorescence 
E.) electron

Answer 6

A.) bright field

Question 7

The purpose of staining cells on a microscope is to
A.) kill them
B.) secure them to the slides
C.) enlarge them
D.) add contrast in order to see them better
E.) see motility

Answer 7

D.) add contrast in order to see them better