What is the largest carbon reservoir on Earth?
a. the aquatic biosphere
b. the oceans
c. rocks and sediments
d. the terrestrial biosphere
Answer: C
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You are given an unknown organism to identify. It is unicellular and heterotrophic
It is motile, using many short extensions of the cytoplasm, each featuring the 9 + 2 filament pattern. It has well-developed organelles and two nuclei, one large and one small. This organism is most likely to be a _____. A) foraminiferan B) radiolarian C) ciliate D) kinetoplastid E) slime mold
What would be the outcome if the pump protein shown in Fig. 5.13a instead acted as a carrier that allowed protons to move from the extracellular fluid into the cytoplasm?
A. The proton electrochemical gradient would be reversed. B. ATP could be synthesized from ADP + Pi. C. The number of protons on either side of the membrane would equalize. D. Two answer options are true: ATP could be synthesized from ADP + Pi AND the number of protons on either side of the membrane would equalize.
When an allele can produce a range of phenotypes, its expression is said to be
a. clearly established. b. variable. c. codominant. d. incompletely dominant. e. incompletely penetrant.
For the following list of anti-HIV drugs and their mechanism of action, identify the mismatch.
A. AZT (azidothymidine); as an analog of thymidine, it is incorporated into viral RNA in place of thymidine B. Protease inhibitor; blocks the active site of the protease required for assembling new viral particles. C. Reverse transcriptase inhibitor; blocks the active site of the enzyme required to convert viral RNA to DNA D. Integrase inhibitor; blocks the active site of the enzyme required to splice HIV DNA into the human genome