exam 1 - 2006 Texas A&M University BIOL111 Example EXAM...

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© 2006 Texas A&M University BIOL111 Example EXAM 1 1) How many molecules of glycerol (C 3 H 8 O 3 ) would be present in 1 L of a 1 M glycerol solution? 1) _______ A) 14 B) 6.02 × 10 23 C) 1 × 10 26 D) 92 E) 1 2) Which of the following are polysaccharides? 2) _______ A) glycogen B) chitin C) starch D) A and B only E) A, B, and C 3) How do isotopes of the same element differ from each other? 3) _______ A) number of electrons B) amount of radioactivity C) valence electron distribution D) number of neutrons E) number of protons The following questions refer to the molecules shown in Figure 4.7. Figure 4.7 4) Which molecule is an alcohol? 4) _____________ 5) Which molecule contains a carboxyl group? 5) _____________ 6) The lowest level of biological organization that can perform all the activities required for life is the 6) _______ A) organ system-for example, the reproductive system. B) organism-for example, an amoeba, dog, human, or maple tree. C) organelle-for example, a chloroplast. D) cell-for example, a skin cell. E) tissue-for example, nervous tissue.
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© 2006 Texas A&M University 7) For most ecosystems ________ is (are) the ultimate source of energy, and energy leaves the ecosystem in the form of ________. 7) _______ A) sunlight; heat B) plants; heat C) plants; animals D) producers; consumers E) heat; light 8) A compound contains hydroxyl groups as its predominant functional group. Which of the following statements is true concerning this compound? 8) _______ A) It should dissolve in water. B) It lacks an asymmetric carbon, and it is probably a fat or lipid. C) It should dissolve in a nonpolar solvent. D) It is hydrophobic. E) It won't form hydrogen bonds with water. 9) In a hypothetical world, every 50 years people over 6 feet tall are eliminated from the population (Bummer for me!). Based on your knowledge of natural selection, you would predict that the average height of the human population will 9) _______ A) gradually decline. B) rapidly increase. C) remain unchanged. D) rapidly decline. E) gradually increase. 10) Which of the following descriptions best fits the class of molecules known as nucleotides? 10) ______ A) a nitrogenous base and a phosphate group B) a pentose sugar and a purine or pyrimidine C) a phosphate group and an adenine or uracil D) a nitrogenous base and a pentose sugar E) a nitrogenous base, a phosphate group, and a pentose sugar 11) Why does ice float in liquid water? 11) ______ A) The liquid water molecules have more kinetic energy and thus support the ice. B) The crystalline lattice of ice causes it to be denser than liquid water. C) Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water. D) The ionic bonds between the molecules in ice prevent the ice from sinking.
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This note was uploaded on 04/09/2010 for the course BIOL 111 taught by Professor Rizzo during the Spring '07 term at Texas A&M.

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exam 1 - 2006 Texas A&M University BIOL111 Example EXAM...

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