Suicide genes can be controlled by the fimbriae-gene operator. This would result in the death of
A) All cells.
B) Cells making flagella.
C) Cells making fimbriae.
D) Cells at 37°C.
E) Conjugating cells.
Answer: C) Cells making fimbriae.
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Koch's postulates include all the following except:a
when a sample of a pure culture is injected into a healthy host, it causes the same disease. b. a sample of the microorganism from a diseased host can be grown in pure culture. c. the microorganism can be recovered from an experimentally infected host. d. the microorganism must be visible in the electron microscope. e. the pathogen must be present in every individual with the disease.
Which of the following characteristics or actions is associated with a steroid hormone?
A. cyclic AMP B. activation of proteins present in an inactive form C. the second messenger D. production of new proteins E. binding of a protein to a surface receptor on the plasma membrane
Which of the following is/are associated with "affective aggression"?
a. high sympathetic ANS activity b. stimulation of the medial hypothalamus c. attacks on other animals for food/kill d. a and b e. none of the above
List the three processes involved in the formation of urine in order. 1. tubular secretion 2. tubular reabsorption 3. glomerular filtration
A. 1, 2, 3 B. 2, 3, 1 C. 2, 1, 3 D. 1, 3, 2 E. 3, 2, 1