Synthesis of a protein is an example of a chemical reaction that is ______________
A. exergonic and catabolic
B. exergonic and anabolic
C. endergonic and catabolic
D. endergonic and anabolic
E. explosive
Answer Key: D
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The major opposition to the Extraterrestrial Hypothesis is
A. not enough organic carbon molecules could have been transported to the Earth's surface by comets and asteroids. B. most organic carbon molecules, including nucleic acids and amino acids, would have been destroyed by the intense heating that occurs when large bodies fall through the Earth's atmosphere. C. not enough comets and asteroids hit the Earth to deliver organic carbon molecules to the surface. D. most of the organic carbon molecules would have fallen into the seas, helping life form in the water but not on the land. E. without oxygen in the atmosphere the organic carbons that did fall would have been rapidly reduced to inorganic carbon compounds.
Which of the following would work as an antidote for someone who was bitten by a black
widow spider?
a. a drug that blocks the sodium–potassium pump b. a drug that causes potassium gates to open c. a drug that blocks acetylcholine binding sites d. a drug that stimulates the release of calcium
The reintroduction of wolves in the year 1995 increased biodiversity in Yellowstone National Park by suppressing elk and coyote populations, allowing revegetation of stream and river banks.
a. The United States b. Russia c. The United Kingdom d. Canada
Which phylum is most closely related
developmentally to the first vertebrates? a. Echinodermata b. Arthropoda c. Mollusca d. Annelida e. none of these