In an agglutination test, eight serial dilutions to determine antibody titer were set up. Tube #1 contained a 1:2 dilution; tube #2, a 1:4, etc. If tube #6 is the last tube showing agglutination, what is the antibody titer?
A) 6
B) 1:6
C) 64
D) 1:32
E) 32
C
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A drug exhibiting which therapeutic index value would be the safest, most effective to use on a patient?
A. 1 B. 20 C. 10 D. 0.1 E. Any choice would be equally effective.
Bacteria that do not have a fixed shape are said to be ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is TRUE?
a. Once a person reaches maturity, cell division stops except to repair wounds. b. Cell division in an adult signifies cancer. c. Some specific cells throughout the body retain the ability to divide and replace themselves. d. Growth continues throughout the life of an adult human. e. All cells retain the ability to divide even after the organism reaches maturity.
Often, the second part of a scientific name is
a. a Latinized description of a particular trait b. the same as for other members of the same genus c. capitalized if it derives from a proper name d. different in different locations