Which molecule would be an indicator of fungal contamination in a drug preparation?
A. Lignin
B. Collagen
C. Deoxyribose
D. Cellulose
E. Chitin
Answer: E
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A ________ epidemic is characterized by a sharp rise to a peak then a rapid, but not as pronounced, decline in the number of individuals infected.
A. common-source B. sporadic C. herd D. propagated
Geneticists study _______ to determine the possible outcomes of single-gene traits
a. probability b. segregation c. dominance d. independent assortment e. phenotype
You conduct an experiment in which you add increasing amounts of substrate to an enzyme solution and then measure
the resulting reaction rate. You plot the rate of the reaction on the Y-axis versus substrate concentration on the X-axis. What do you conclude from your graph? a. The reaction rate is independent of substrate concentration. b. The reaction rate decreases with increasing substrate concentration. c. The reaction rate is directly proportional to substrate concentration. d. The reaction rate increases but then decreases, forming a bell-shaped curve. e. The reaction rate increases with increasing substrate concentration up to a point, above which the rate remains constant.
A neuron and a nerve differ in that
A. nerves are bundles of fibers and neurons are single cells. B. neurons carry impulses and nerves do not. C. neurons are found in the peripheral nervous system only. D. nerves are attached to neurons.