The 2003 outbreak of SARS began in
a. the United States.
b. Great Britain.
c. Russia.
d. Africa.
e. China.
E
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____ requires both a template and an appropriately placed 3' end to synthesize a nucleic acid
Fill in the blank with the appropriate word.
Which of the following events involves the release of enzymes?
A. cell cleavage B. cortical reaction C. egg membrane depolarization D. increase in cytosolic calcium within the egg E. the fusion of egg and sperm nuclei
The net movement of molecules or ions from a low concentration to a higher concentration is called ____
a. active transport b. facilitated diffusion c. exocytosis d. osmosis e. diffusion
Diphtheria is considered to be an upper respiratory tract infection. However, it can have a very high mortality rate if not caught early and treated. Predict why this is so.
A. The patient cannot eat or drink and so basically starves to death. B. It makes a toxin that can be carried in blood and produce organ damage, particularly the heart. C. It successfully hides from the immune system of the patient. D. The bacterium moves from the throat to the brain, causing strokes to occur.