The base that is not found in DNA, but only in RNA is ________.
A. adenine
B. guanine
C. uracil
D. thymine
Answer: C
Biology & Microbiology
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The cells that actually secrete antibodies are
A. plasma cells. B. natural killer cells. C. phagocytes. D. T cells.
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Changes in community composition and structure over time are called
A) succession. B) stratification. C) zonation. D) characterization.
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At which point in the graph do voltage-gated potassium channels open?
A) A B) B C) C D) D E) E
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What is the most effective way of killing Staphylococcus in the food you are preparing?
A) Use a good antiseptic on the food itself before preparing it. B) Cook the food thoroughly. C) Nothing; this organism never is spread in food. D) Mix antibiotics in with the food.
Biology & Microbiology