Which of the following statements about drugs that competitively inhibit DNA polymerase or RNA polymerase is FALSE?
A) They can potentially cause mutations.
B) They are used against viral infections.
C) They can affect host cell DNA synthesis.
D) They cause cellular plasmolysis.
E) They interfere with protein synthesis.
Answer: D) They cause cellular plasmolysis.
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The aerated upper layer of soil is likely to have ________ concentrations of H2 for aerobic H2-oxidizing Bacteria, so these bacteria likely ________
A) high / thrive in such conditions by not competing with chemoorganotrophs B) high / generate important reducing equivalents as byproducts for other microorganisms in the soil C) low / do not occur in such habitats D) low / will need a chemoorganotrophic way to grow as well
The Rickettsial disease that killed Howard Ricketts and Stanislaus Prowazek was
A. louse-borne typhus. B. tick-borne typhus. C. yellow fever. D. bubonic plague
If you expose a plant to a light that shines on the right side of a plant, which of the following best
describes why the plant grows toward the light? a. Light destroys auxin, and thus the shaded side grows faster. b. Auxin moves from the shaded side to the lighted side where it stimulates growth. c. Auxin moves from the lighted side to the shaded side where it stimulates growth. d. Light destroys auxin and thus the lighted side grows faster. e. Auxin moves from the shaded side to the lighted side where it inhibits growth.
What would the phenotype of a heterozygous individual be if black coat color is dominant over white coat color in mice?
A. Black (the black allele is dominant over the white so white will not show at all) B. White C. Grey D. Black with white spots