MICROBIOLOGY-ACCESS >CUSTOM<
13th Edition
ISBN: 9780135668825
Author: Tortora
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 4A
In 1985, a 0.5-mm cell was discovered in surgeonfish and named Epulopiscium fishelsoni (see Figure 11-14 page 308). It was presumed to be a protozoan. In 1993, researchers determined that Epulopiscium was actually a gram-positive bacterium. Why do you suppose this organism was initially identified as a protozoan? What evidence would change the classification to bacterium?
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In 1985, a 0.5-mm cell was discovered in surgeonfish and named Epulopiscium fishelsoni. It was presumed to be a protozoan. In 1993, researchers determined that Epulopiscium is actually a gram-positive bacterium. Why do you suppose this organism was initially identified as a protozoan?
30) A water sample from a hot thermal vent contained a single-celled organism that had a cell wall but
lacked a nucleus. What is its most likely classification?
A) Eukarya
B) Archaea
C) Animalia
D) Protista
E) Fungi
31) To establish a link between a specific bacterium and a skin disease, researchers have shown that the
bacterium was present in sick persons but not in healthy individuals. They isolated the bacterium in a
pure culture and demonstrated that experimental healthy animals injected with this culture became
sick. What other experiment do researchers need to perform to be absolutely sure that the bacterium is
responsible for the disease?
A) Demonstrate that the bacterium belongs to the pathogenic lineage
B) Demonstrate that the bacterium is not able to live outside of humans or animals
C) Isolate bacterium from an infected sick animal and demonstrate that it is the same bacterium as the
one used for infection
D) Isolate bacterium from an infected sick animal and demonstrate…
When do we make the determination that a bacterium is Gram positive?
A) Safranin washes the crystal violet die out of the cell wall.
B) Crystal violet die is not able to absorb into the cell wall.
C) Alcohol does not wash the crystal violet die out of the cell wall.
D) Crystal violet turns the bacterium a yellow color.
Chapter 4 Solutions
MICROBIOLOGY-ACCESS >CUSTOM<
Ch. 4 - DRAW IT Diagram each of the following flagellar...Ch. 4 - Endospore formation is called (a) _____. It is...Ch. 4 - DRAW IT Draw the bacterial shapes listed in (a),...Ch. 4 - Match the structures in column A to their...Ch. 4 - Why is an endospore called a resting structure? Of...Ch. 4 - Compare and contrast the following a. simple...Ch. 4 - Prob. 7RCh. 4 - Starch is readily metabolized by many cells, but a...Ch. 4 - Match the characteristics of eukaryotic cells in...Ch. 4 - NAME IT What group of microbes is characterized by...
Ch. 4 - Which of the following is not a distinguishing...Ch. 4 - Which statement best describes what happens when a...Ch. 4 - Which statement best describes what happens when a...Ch. 4 - Which statement best describes what happens when a...Ch. 4 - Which of the following statements best describes...Ch. 4 - Which of the following is false about fimbriae? a....Ch. 4 - Which of the following pairs is mismatched? a....Ch. 4 - Which of the following pairs is mismatched? a....Ch. 4 - You have isolated a motile, gram-positive cell...Ch. 4 - The antibiotic amphothericin B disrupts plasma...Ch. 4 - How can prokaryotic cells be smaller than...Ch. 4 - The smallest eukaryotic cell is the motile alga...Ch. 4 - Two types of prokaryotic cells have been...Ch. 4 - In 1985, a 0.5-mm cell was discovered in...Ch. 4 - When E. coli cells are exposed to a hypertonic...Ch. 4 - Clostridium botulinum is a strict anaerobe; that...Ch. 4 - A South San Francisco child enjoyed bath time at...Ch. 4 - Live cultures of Bacillus thuringiensis (Dipel)...
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