Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Chapter 10, Problem 6MCQ
The wall-less mycoplasmas are considered to be related to gram-positive bacteria. Which of the following would provide the most compelling evidence for this?
- a. They share common rRNA sequences.
- b. Some gram-positive bacteria and some mycoplasmas produce catalase.
- c. Both groups are prokaryotic.
- d. Some gram-positive bacteria and some mycoplasmas have coccus-shaped cells.
- e. Both groups contain human pathogens.
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We will perform a gram stain on our samples, so be sure to bring your instructions on gram staining.
Will this procedure stain all cells?
A. Yes, all prokaryotic and eukaryotic cells will be stained purple or pink.
B. All prokaryotic cells will be stained.
Eukaryotic cells will not be stained.
C.Mycobacteria and a few other groups with special cell wall structures will not be stained.
All other prokaryotic cells will be stained.
Eukaryotic cells will be stained pink.
D. Mycobacteria and a few other groups with special cell wall structures will not be stained.
All other prokaryotic cells will be stained.
Eukaryotic cells will be stained purple.
Gram-positive (+) and gram-negative (-) bacteria are characterized by differences in
a. the cell wall: gram+ have peptidoglycan, gram– have pseudopeptidoglycan.
b. the plasma membrane: gram+ have ester-linked lipids, gram–have ether-linked lipids.
c. the cell wall: gram+ have a thick layer of peptidoglycan and gram– have an outer membrane.
d. chromosomal structure: gram+ have circular chromosomes, gram– have linear chromosomes.
Members of the mycoplasma genus of bacteria do not have a cell wall for protection, existing with only a simple cell membrane made up of fatty acids and phospholipids. They cannot however, synthesize their own fatty acids. How is this possible?
A. They use host materials
B. They use peptidoglycan from other bacteria
C. They use anabolism as a way to create their outer membrane
D. They use amino acids to build their membranes
Chapter 10 Solutions
Microbiology: An Introduction
Ch. 10 - Which of the following organisms are most closely...Ch. 10 - Here is some additional information on the...Ch. 10 - DRAW IT Use the additional information below to...Ch. 10 - DRAW IT Use the information in the table below to...Ch. 10 - NAME IT Use the key in the Applications of...Ch. 10 - Sergeys Manual of Systematic Bactenoiogy differs...Ch. 10 - Bacillus and Lactobacillus are not in the same...Ch. 10 - Prob. 3MCQCh. 10 - Which of the following is false about scientific...Ch. 10 - You could identify an unknown bacterium by all of...
Ch. 10 - The wall-less mycoplasmas are considered to be...Ch. 10 - Use the following choices to answer questions 7...Ch. 10 - Prob. 8MCQCh. 10 - Prob. 9MCQCh. 10 - Use the following choices to answer questions 9...Ch. 10 - The GC content of Micrococcus is 66-75 moles %,...Ch. 10 - Describe the use of a DNA probe and PCR for: a....Ch. 10 - SF medium is a selective medium, developed in the...Ch. 10 - Prob. 1CAECh. 10 - Prob. 2CAECh. 10 - Prob. 3CAE
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