What characteristic of Borrelia burgdorferi makes it an unusual bacterium?
A) It is a Gram-negative bacterium that lacks an LPS layer.
B) It is a spirochete that is motile.
C) It causes damage to multiple organ systems.
D) Transovarian transmission of the pathogen is rare.
E) It is transmitted by an arthropod vector.
A
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What key words does the question contain and what do they mean?
What will be an ideal response?
Bacterial flagella ____
a. are smaller and simpler than eukaryotic flagella b. consist of a straight fiber of protein c. are found in all motile bacteria d. are powered by a gradient of calcium ions e. contain microtubules
What is the relationship between recombination frequency and the actual physical distance on a chromosome?
A. As physical distance increases, the recombination frequency increases in a linear fashion. B. As physical distance increases, the recombination frequency first increases in a linear fashion, but gradually levels off to a frequency of 0.5. C. As physical distance increases, the recombination frequency decreases in a linear fashion. D. As physical distance increases, the recombination frequency first increases, but then decreases.
Researchers are developing a ribozyme that cleaves the HIV genome. This pharmaceutical agent could be described as
A) an RNA molecule capable of catalysis. B) a hydrolase. C) a genetic transposable element. D) a protease inhibitor. E) a competitive inhibitor for reverse transcriptase.