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Lecture 7

BIOL 1202 Lecture Notes - Lecture 7: Pilus, Hydrogen Sulfide, Antimicrobial Resistance

Biological Sciences
Course Code
BIOL 1202

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1. What is the function of fimbriae?
a. They are used to attach the cell to its substrate or to other prokaryotes.
2. In a bacterium that possesses antibiotic resistance and the potential to persist through
very adverse conditions, such as freezing, drying, or high temperatures, DNA should be
located within, or be part of, which structures?
1. nucleoid region
2. endospore
3. fimbriae
4. plasmids
a. 1, 2, 4
3. Which statement about the genomes of prokaryotes is correct?
a. Prokaryotic genomes are composed of circular chromosomes.
4. If a bacterium regenerates from an endospore that did not possess any of the plasmids
that were contained in its original parent cell, the regenerated bacterium will probably
a. Lack antibiotic-resistant genes
5. In a hypothetical situation, the genes for sex pilus construction and for tetracycline
resistance are located together on the same plasmid within a particular bacterium. If this
bacterium readily performs conjugation involving a copy of this plasmid, then the result
should be
a. The rapid spread of tetracycline resistance to other bacteria in that habitat.
6. Which two species should have much more phospholipid, in the form of bilayers, in their
cytoplasm’s than most other bacteria?
b. species B and E
7. Which species should be able to respond most readily to taxes (plural of taxis)?
a. (use table above) Species C
8. Gram-variable prokaryotes are, sometimes, those without any peptidoglycan.
Which two species are most likely to be Archaean’s?
a. (use table above) species A and B
9. Bacteria that live around deep-sea, hot-water vents obtain energy by oxidizing inorganic
hydrogen sulfide belched out by the vents. They use this energy to build organic
molecules from carbon obtained from the carbon dioxide in seawater. These bacteria are
a. Chemoautotrophs
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