SAMPLE 1 - spring10 - Spring 2010 SAMPLE QUESTIONS FOR EXAM...

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Spring 2010 SAMPLE QUESTIONS FOR EXAM 1 --------- BIO 3710 Hydrogen bonds occur between: a. two hydrogen atoms of a single water molecule b. a hydrogen atom and the oxygen atom of a water molecule c. a hydrogen atom of water and the nitrogen atom of an ammonium ion d. two hydrogen atoms of a single ammonia molecule e. all of these The electronegative region of a water molecule is: a. on the side of the oxygen that holds the oxygen b. on the side of the oxygen that is opposite to the hydrogen c. on the side of the hydrogen that is opposite to the oxygen d. none of these The kink or bend in the tail of a fatty acid molecule is at a point where: a. a double bond is found b. -CH 3 groups are held by carbonyl linkages c. a fatty acid is missing d. none of these Which one of the following is not a chemical difference between DNA and RNA: a. the bases present b. the sugars present c. the structure of the phosphodiester bonds d. the nucleosides present A solution with a pH of 4 has ____ times more hydronium ions than a solution with a pH of 7. a. 2 b. 4 c. 10 d. 100 e. none of these A hydrophilic group is: a. attracted to water b. a polar or ionized group c. a component of a fatty acid d. all of these e. a and b only Which statement is incorrect regarding functional groups? a. they result in increased polarity of molecules b. provide a redistribution of electrons within the molecules c. increase the chemical reactivity of molecules d. decrease the water solubility of molecules Fats are hydrophobic. Which statement provides the best explanation? a. fats consist mainly of long chains of carbohydrate lacking polar bonds incapable of interacting via hydrogen bonding b. fats are triglycerides with long non-polar hydrocarbon chains making them hydrophobic c. most fats are solid at room temperature d. fats are lipids containing multiple polar functional groups incapable of reacting with water Which of the following is not a fundamental property of carbon? a. carbon has a valence number of 4 electrons b. carbon containing molecules are stable c. carbon atoms are most likely to form ionic bonds with one another d. carbon containing molecules can form stereoisomers The cell membrane can be described most accurately as: a. impermeable to most small molecules, but permeable to others b. impermeable to all polar molecules c. impermeable to all molecules d. permeable to some molecules but not to others Many biological molecules have functional groups that alter the chemical reactivity of the molecule. Which of the
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This note was uploaded on 03/30/2010 for the course BIO cell biolo taught by Professor ? during the Spring '10 term at University of North Carolina Wilmington.

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SAMPLE 1 - spring10 - Spring 2010 SAMPLE QUESTIONS FOR EXAM...

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