What are the two major components of the tobacco mosaic virus?
A) RNA and DNA
B) DNA and protein
C) lipids and nucleic acids
D) carbohydrates and nucleic acids
E) RNA and protein
Answer: E
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If a bacterial cell encounters unfavorable environmental conditions, then its metabolism will begin to slow until it eventually transforms into an inactive, dormant state. This survival me-chanism is known as:
a. polymerization. b. oxidation. c. respiration. d. sporulation.
The SA node, the __________ spontaneously
generates the action potentials that set the pace for cardiac contractions. Fill in the blank(s) with the appropriate word(s).
In the United States, the largest group of endangered species is:
a. mammals. b. flowering plants. c. insects. d. birds. e. amphibians
Cholera enterotoxin causes ________, which is the primary way infected individuals die from the disease
a. extremely high fever b. diarrhea and dehydration c. hemolysis of the intestinal tract cells d. sepsis