Chapter 4

Question 1

The ability to distinguish between two objects close together is call

Answer 1

Resolution

Question 2

A thin film of microorganisms on the surface of a slide is called a ____ , which is usually fixed to the slide with heat.

Answer 2

Smear

Question 3

What microscope produces a beam of electrons that creates an image in a fluorescent screen based on density differences?

Answer 3

Transmission electron microscope

Question 4

The gram stain is considered a differential stain because cells will stain purple or pink based on the amount of ________ present in the cell wall.

Answer 4

Peptidoglycan

Question 5

The system by which all organisms are given to names is called….?

Answer 5

Binomial nomenclature

Question 6

What uses only one dye to enable the viewer to observe the size, shape, or arrangement of cells?

Answer 6

Simple staining

Question 7

Taxonomists reply on what difference to classify bacteria?

Answer 7

Genetic

Question 8

T/F, endospore stains and acid-fast stains both involve heat.

Answer 8

True

Question 9

Which of the following stains is used for visualizing mycobacterium?

Answer 9

Acid-fast stain

Question 10

T/F, An agglutination test is a type of serological test.

Answer 10

True

Question 11

T/F Stains and light are used to increase contrast between cells and their background.

Answer 11

True

Question 12

T/F, Bergey’s Manual is a reference guide for various microscopic techniques.

Answer 12

False

Question 13

T/F, A typical virus could be viewed with a compound light microscope.

Answer 13

False

Question 14

If you wanted to determine whether a microorganism fermented a particular carbohydrate, which of the following kinds of tests would you use?

Answer 14

Biochemical tests

Question 15

Which of the following is NOT a domain proposed by Carol Woese?

Answer 15

Prokarya

Question 16

In the Gram stain, safranin serves as the _____.

Answer 16

Counterstain

Question 17

What is the underlying rationale for how phage typing works?

Answer 17

Phage bind to specific kids of bacterial cells

Question 18

The designation E. coli is a result of which type of microbial identification process?

Answer 18

Serological test

Question 19

Which of the following is a true statement concerning basic dyes?

Answer 19

Basic dyes are attracted to the negatively charged surface of cells.

Question 20

The definition of species for animals may be based on the ability to interbreed and produce viable offspring, but for bacteria, a species is better defined by which of the following?

Answer 20

Cells that are 97% common sequences of DNA