All cells have which of the following?
A) capsule
B) cell membrane
C) cell wall
D) nucleus
Ans: B) cell membrane
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A typical eukaryotic cell that has an abundant supply of glucose and O2 will generate a proton gradient
in its mitochondria by _____________ that is used primarily for _____________.
a. chemiosmosis; substrate-level phophorylation b. the electron transport chain; chemiosmosis c. the electron transport chain; substrate-level phosphorylation d. fermentation; NAD reduction e. glycolysis; production of CO2
The process of filtration in the glomerulus is
driven by a. active transport. b. blood pressure. c. osmosis. d. dialysis. e. sodium-potassium pumps
Researchers applied radioactive phosphorus and radioactive calcium to a freshly cut tree stump. Eight days later, they came back to measure the distribution of the radioisotopes. They found that nineteen different species of shrubs and trees within a seven-meter radius had taken up the radioactive elements. No radioactivity was detected in the air. Radioactive isotopes were never detected in any samples containing just soil taken during the experiment. The finding implies that the
a. soil does not provide the ecosystem with minerals b. isotopes were undetectable in very small amounts c. isotopes were transported via vascular tissues d. plants quickly return minerals to the soil in which they grow e. soil speeds up radioactive decay
The splitting of water produces three products. Name and discuss the role of each.
What will be an ideal response?