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Chapter 3: intro to concepts and tools for microbiology

Terms in this set (18)

Which one of the following sequences exhibits increasing size?
Viruses to bacteria to protists
The resolving power of a lens system indicates
the size of the smallest object that can be seen clearly.
Bergey s Manual of Systematic Bacteriology may be used to
find the proper taxonomic classification for the Bacteria and Archaea
What methods are used to help identify and classify microorganisms today?

A. Physical characteristics including shape, size, and arrangement of cells.

B. Biochemical tests showing metabolic properties.

C. Serological tests with antisera for the production of antibodies.

D. all of the above are currently used
D. all of the above are currently used
The Gram stain technique is valuable in distinguishing
different types of bacteria.
How do bacterial cells control water balance?
Water moves in and out by osmosis.
In eukaryotic microbes, cellular respiration occurs in the
cytosol and mitochondria.
An ocular lens with a magnification of 10X and an objective lens of 40X has a total magnification of
400x
At the conclusion of the Gram stain technique, gram-negative cells are
pink-ish
The correct way to write the name of a bacterium in the binomial system is
a. Esch. col.
B. Escherichia coli.
C. Escherichia coli.
D. Escherichia Coli.
C. Escherichia coli.
Prokaryotes exhibit these common features found in all living things. Identify the exception.

A. They use DNA as the hereditary material.

B. They use complex biochemical patterns of growth and energy conversions.

C. They adapt from one generation to the next.

D. They do not respond to stimuli.
D. They do not respond to stimuli.
Starting with Linnaeus, a hierarchical system was established for cataloging of living things. What did this mean at that time?
Grouping of species by shared and common characteristics.
The binomial system of nomenclature for microorganisms uses the
genus and specific epithet.
All the following are characteristics of prokaryotes except:
A. prokaryotes have an endomembrane system.

B. prokaryotes have ribosomes.

C. prokaryotes lack a nucleus.

D. prokaryotes have circular DNA chromosomes.
A. prokaryotes have an endomembrane system.
Carl Woese proposed a new classification system of three domains. What were these three domains?
These were Archaea, Bacteria, and Eukarya.
Prokaryotes and eukaryotes differ primarily with regard to the absence or presence of a
nucleus
One important ability that all cells must have to survive is maintaining a relatively stable internal environment. This is called
homeostasis
The ability of bacterial cells to sense their numbers by producing and responding to extracellular chemicals is called
quorum sensing.
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