Martha Chase and Alfred Hershey conducted experiments to identify the genetic material used by bacteriophages to reproduce inside bacteria. As part of their procedure, they successfully isolated these viruses from the bacteria they infected. Why is this same procedure not used to remove viruses from living tissues?
a. Bacteria have capsules that make them buoyant in solution.
b. The phages were specifically chosen for ease of filtration.
c. Most tissues fare poorly when blended and centrifuged.
d. The sorting process requires injecting radioactive dyes.
c. Most tissues fare poorly when blended and centrifuged.
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Activation energy is best described as ________
a. the difference in the energy level of the reactants and the energy level of the products b. the minimum amount of energy it takes to get a reaction started c. the proportion of the energy released by an endergonic reaction that can be captured by ATP d. the minimum amount of energy a reaction produces once it gets started
Most of the water vapor in the earth's atmosphere comes from evaporation from
a. lakes. b. rivers. c. land. d. oceans. e. plants.
An examination of fossil records shows that three modern species all had a common ancestor. This is an example of
A. polyploidy. B. divergent evolution. C. convergent evolution. D. three subspecies.
How many net ATP molecules are produced per molecule of glucose broken down during glycolysis?
A. One B. Two C. Four D. 36 E. 38