The modern era of genetic manipulation began when scientists first learned how to insert genes into
a. viruses
b. roundworms
c. bacteria
d. Sheep
Ans: c. bacteria
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Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is
A. active transport. B. osmosis. C. simple diffusion. D. phagocytosis. E. pinocytosis.
The fusion of the cytoplasms of two genetically different cells is known as ____
a. osmosis b. karyogamy c. cytoplasmic streaming d. plasmogamy e. mutual symbiosis
The movement of water through a plant is
driven by
a. the drying power of the air. b. osmosis. c. active pumping using ATP. d. root pressure. e. a combination of more than one of these
Glycolysis is active when cellular energy levels are _____; the regulatory enzyme, phosphofructokinase, is _____ by ATP
A) low; activated B) low; inhibited C) high; activated D) high; inhibited