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Biology Laboratory Manual, 6/e
Darrell S. Vodopich, Baylor University
Randy Moore, University of Minnesota--Minneapolis

Exercise 23 - Survey of Bacteria

Choose the one answer that best answers the question.



1

____ organisms' cells contain membrane-bound organelles. All bacteria are ____ organisms.
A)prokaryotic, prokaryotic
B)prokaryotic, eukaryotic
C)eukaryotic, prokaryotic
D)eukaryotic, eukaryotic
2

Which of the following beneficial bacteria is found in the human intestine?
A)Bacillus megaterium
B)Rhodospirillum rubrum
C)Escherichia coli
D)Staphylococcus epidermis
3

The process of nitrogen fixation ...
A)transforms organic nitrogen into atmospheric nitrogen.
B)transforms atmospheric nitrogen into nitrogenase.
C)occurs in Rhizobium cells.
D)is used by all species of bacteria.
4

A medical laboratory may use a ___ to determine exactly which antibiotic will be most effective in treating a bacterial infection.
A)sensitivity plate
B)Gram stain
C)bacterial colony
D)heterocyst
5

Which genus of cyanobacteria with a thick gelatinous sheath was viewed during the lab exercise?
A)Escherichia
B)Bacillus
C)Nostoc
D)Gleocapsa
6

Rhizobium is a common bacterium found in the ____ of some plant roots.
A)heterocysts
B)nodules
C)endospores
D)sheaths
7

Which of the following bacteria causes stomach ulcers?
A)Yersinia pestis
B)Vibrio cholerae
C)Helicobacter pylori
D)Salmonella typhi
8

Which technique was used in lab to classify bacteria by the composition of their cell wall?
A)sensitivity plate
B)Gram stain
C)nitrogen fixation
D)culturing
9

What are long chains of cyanobacterial cells called?
A)heterocysts
B)sheaths
C)bacterial colonies
D)trichomes
10

What is an autotroph?
A)an organism that can produce its own food
B)an organism that is unable to produce its own food
C)a type of prokaryote
D)a bacterium that can fix nitrogen








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