Which of the following is characteristic of Yersinia pestis infections?
A) petechiae
B) a "bull's-eye" rash
C) jaundice
D) arthritis
E) buboes
E
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________ enables a single gene to encode two or more polypeptides that are different in their amino acid sequence.
A. Reverse transcription B. Self-splicing C. Capping D. Alternative splicing E. Regulatory splicing
Fluidity of a membrane depends on the
a. length of the phospholipid fatty acid chains. b. temperature. c. number of double bonds in the fatty acid chains. d. All of the above
Pangea, the name given to the supercontinent that existed before continental drift, was coined by:
a. Sir Francis Bacon. b. Alfred Wegener. c. Harry Hess. d. Edward Suess. e. Sir Alistair Hardy.
The human immunodeficiency virus targets:
A) helper T cells. B) all white blood cells. C) bone marrow cells. D) lymph nodes.