Yaws is a serious skin disease of children in tropical countries, caused by Treponema pertenue, a species closely related to the bacteria that cause syphilis. Individual cells of T. pertenue are helical, relatively long, and flexible like the one pictured below. These cells are known as _____.
Fill in the blank(s) with the appropriate word(s).
Answer: spirochetes
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Fragile sites appear as ____________________ or ____________________ at specific sites on a chromosome
Fill in the blank(s) with correct word
What structure acts as a selective barrier, regulating the traffic of materials into and out of the cell?
a. nuclear envelope b. endomembrane system c. cytoskeleton d. extracellular matrix e. plasma membrane
Which of the following types of information would be most useful in an effort to move a DNA fragment from one plasmid vector to another, using molecular cloning techniques?
A. sequence of PCR primers B. restriction maps of the plasmids C. data from cloning of Dolly the sheep D. DNA fingerprint data
All of the following are located on the exterior
surface of a prokaryote EXCEPT a. flagellum b. pilus c. plasma membrane d. capsule e. none of these