KEY for test 1 2006 - Name BMB 280 Thursday February 8 2006...

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Name ____________________ BMB 280 Thursday February 8, 2006 pg 1 Test #1 (Covers Lectures 1-6,Cell Introduction to Enzymes) Section I. MULTIPLE, Multiple Choice. Rarely is there just one right answer in life. These questions are designed to explore the different characteristics of individual things, processes or properties. Indicate ALL of the answers below that correctly relate to the questions in bold type. Note: there is frequently more than one right answer! Sometimes there IS only one correct choice, other times none of the choices are correct, or all may be correct. Think of this as a type of “true-false” question for each choice to the question. Each choice is worth 0.5 pt; that is, if you say it is correct and it is, you get 0.5 pt; if you don’t say it is correct and it is, you lose 0.5 pt, etc. 61 pts total 1. Reactions resulting in a ______ of heat _____ the environment are called _____. a. loss, to, exothermic reactions b. loss, to, endothermic reactions c. loss, to, enthalpic reactions. d. gain, from, tropical reactions. e. gain, from, endothermic reactions f. gain, from, exothermic reactions 2. Condensation-dehydration reactions are responsible for: a. formation of micelles. b. formation of the peptide bond. c. formation of triglycerides from fatty acids and glycerol. d. formation of the domestic surveillance program. e. linkage of nucleotides to form a DNA chain. f. polymerization of monomeric carbohydrate sugars into starch. 3. A reaction with a H of +55 kcal/mole and a S of +2 kcal/mole at 300ºK : a. is a thermodynamically favorable 4. What level of structure in proteins is held together by interactions between amino acid R groups (their side chains)? a. primary structure b. secondary structure c. tertiary structure d. quaternary structure reaction. b. is a thermodynamically un favorable reaction. c. has a G of + 53 kcal/mole. d. has a G of + 57 kcal/mole. e. has a G of – 545 kcal/mole. f. is an entropically driven reaction. g. is an enthalpically driven reaction. h. “is designed to protect civil liberties” i. has a Km of 53 kcal/mole. “Here’s lookin’ at you, kid”
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Name ____________________________________________ BMB 280 EXAM #1 pg 2 5. What kind of bond results from an unequal sharing of electrons? a. ionic bond (electrons are not shared, they are gained or lost to form charged species) b. polar covalent bond c. H bond d. James Bond e. nonpolar covalent bond (electrons shared equally) 6. Entropy: a. as defined by the 2 nd Law of Thermodynamics, is the tendency of the Universe to proceed to a state of maximum disorder. b. is the sum of all the bond energies within a molecule. enthalpy c. contributes to the free energy change of a reaction. d. must be positive if G is negative and H is positive. e. must be negative if G is negative. f. must be negative if H is negative. g. must be true if Allen Greenspan said it.
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KEY for test 1 2006 - Name BMB 280 Thursday February 8 2006...

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