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AP+Midterm+Review+09-10

AP+Midterm+Review+09-10 - AP BIOLOGY Midterm Exam Review...

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AP BIOLOGY Midterm Exam Review 2009-2010 Name: ______________________________ Section 1 Biochemistry MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter? A) oxygen, hydrogen, calcium, sodium B) carbon, sodium, chlorine, nitrogen C) carbon, oxygen, sulfur, calcium D) carbon, sulfur, phosphorus, hydrogen E) carbon, hydrogen, nitrogen, oxygen 2) A covalent bond is likely to be polar when 3) Which of the following explains most specifically the attraction of water molecules to one another? 4) Which of the following best describes chemical equilibrium?
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5) A group of molecular biologists is trying to synthesize a new artificial compound to mimic the effects of a known hormone that influences sexual behavior. They have turned to you for advice. Which of the following compounds is most likely to mimic the effects of the hormone? A) a compound with the same three - dimensional shape as part of the hormone B) a compound with the same number of carbon atoms as the hormone C) a compound with the same molecular mass (measured in daltons) as the hormone D) a compound with the same number of hydrogen and nitrogen atoms as the hormone E) a compound with the same number of orbital electrons as the hormone 6) Which of the following statements correctly defines a kilocalorie?
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