Which of the following can describe the plasma membrane?
a. semi-permeable
b. selectively permeable
c. selectively impermeable
d. semi-impermeable
b. selectively permeable
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How many oxygen molecules (O2) are required each time a molecule of glucose (C6H12O6) is completely oxidized to carbon dioxide and water via aerobic respiration?
A) 1 B) 3 C) 6 D) 12 E) 30
A researcher wants to determine if a unicellular organism he discovered is an autotroph or a heterotroph
He radioactively labels the carbon in CO2 and C6H12O6, and exposes one culture of his organism to the labeled CO2 and another culture to the labeled C6H12O6. What would happen if his organism is an autotroph? A. Labeled carbon would be seen in the carbohydrates of CO2-exposed organisms. B. Labeled carbon would be seen in the carbohydrates of C6H12O6-exposed organisms. C. Labeled carbon would not be seen in the carbohydrates of either culture. D. Labeled carbon would be seen in carbohydrates of both cultures.
Four of the five processes listed below occur when
the stomata are open. Select the exception. a. ATP is used b. potassium pump operates c. active transport occurs d. water is conserved e. guard cells swell with water
What is the first step in the production of a miRNA?
A. transcription from a nuclear gene B. cleavage to form a short double-stranded RNA C. infection with a virus D. design of an experimental treatment E. export of the pre-miRNA from the nucleus