Practice-Exam1 - Bio 311C Exam 1 FORM A September 18, 2009...

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Bio 311C Exam 1 FORM A Name__________________________________________ September 18, 2009 UT EID ________________________________________ Multiple Choice (2 pts each) Choose the one alternative that best completes the statement or answers the question. Write your answer here and also bubble it in on the scan form. 1.________ A covalent bond is likely to be polar when (A) the two atoms sharing electrons are different elements. (B) one of the atoms sharing electrons is much more electronegative than the other. (C) the two atoms sharing electrons are of the same element. (D) the two atoms sharing electrons are equally electronegative. (E) it is between two atoms that are both very strong electron acceptors. 2.________Which bonds must be broken for water to vaporize? (A) hydrogen bonds; (B) nonpolar covalent bonds ; (C) polar covalent bonds; (D) ionic bonds; (E) peptide bonds 3. ________ Which of the following solutions has the greatest concentration of hydrogen ions? (A) vinegar at pH 3; (B) stomach juice at pH 2; (C) household bleach at pH 12; (D) black coffee at pH 5 ; (E) tomato juice at pH 4 4.________ Amino acids are acids because they always possess which functional group? (A) methyl; (B) hydroxyl; (C) amino; (D) sulfhydry; (E) carboxyl 5.________ Humans can digest starch but not cellulose because (A) humans harbor starch-digesting bacteria in the digestive tract. (B) humans have enzymes that can hydrolyze the alpha glycosidic linkages of starch but not the beta glycosidic linkages of cellulose. (C) humans have enzymes that can hydrolyze the beta glycosidic linkages of starch but not the alpha glycosidic linkages of cellulose. (D) the monomer of starch is glucose, but the monomer of cellulose is galactose, a monosaccharide. (E) the monomer of starch is glucose, but the monomer of cellulose is maltose, a disaccharide 6________ Saturated fatty acids (A) are usually liquid at room temperature; (B) have double bonds between carbon atoms of the fatty acids; (C) are usually produced by plants; (D) are the predominant fatty acid in corn oil; (E) have a higher ratio of hydrogen to carbon than do unsaturated fatty acids. 7_________Complex carbohydrates, lipids, and proteins are similar in that they (A) all contain
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This note was uploaded on 12/05/2010 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas.

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Practice-Exam1 - Bio 311C Exam 1 FORM A September 18, 2009...

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