Which activity is an example of biotechnology?
A. Egyptians using moldy bread on wounds
B. Escherichia coli producing human insulin
C. Public health officials monitoring diseases in a community
D. A microbiologist using the microscope to view bacteria
E. Bacteria in the soil secreting an antibiotic to kill competitors
Answer: B. Escherichia coli producing human insulin
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A mordant that is applied after the primary stain to bond chemically the alkaline dye to the bacterial cell wall is:
a. safranin. b. crystal violet. c. Gram's iodine. d. Gram's decolorizer.
The net movement of substances to regions of lower concentration is called
A. facilitation. B. active transport. C. diffusion. D. osmosis.
Choose the most appropriate letter for each.
A. genetic equilibrium B. species C. gene pool D. p2 E. p+ q F. 2pq G. q2 H. balanced polymorphism I. directional selection
After the end of an enzyme catalyzed reaction, what must occur for an enzyme to be reused?