Name the two cycles in which bacteriophages act when they infect bacteria
What will be an ideal response?
lysis and lysogeny
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Growth factors are examples of which type of chemical signal?
A. paracrine signals B. autocrine signals C. hormones D. pheromones E. neurotransmitters
Which of the following statements does NOT describe a function of the cell walls of bacteria?
A. They maintain cell shape. B. They prevent cross-fertilization. C. They avoid disintegration in water with low concentrations of salt. D. They protect against other bacteria. E. They protect against viruses.
Mad cow disease is caused by an infectious protein, also known as a(n)
a. endospore. b. rickettsia. c. virion. d. prion. e. viroid.
What organelle inactivates toxins?
a. nucleus b. mitochondria c. peroxisomes d. lysosomes e. Golgi body