Exam_1_S08 - 1. The side chains of the amino acids found in...

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1 1. The side chains of the amino acids found in proteins are: a) all different b) have different functions c) have different charges d) attach to the same backbone e) All of the above f) a, b and c 2. What is not part of nucleotide structure? a) Heterocyclic bases b) Ribose c) Phosphate d) Cholesterol e) all are part of nucleotide structure 3. Which is not a biopolymer? a) Proteins b) polysaccharides c) RNA d) amino acids e) DNA f) all the above are biopolymers
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2 4. The 3-D shape of a protein is: a) very critical to protein function b) dependent on amino acid sequence c) dependent on correct folding of amino acid sequence d) a and c e) all of the above 5. Our bodies, in terms of energy, are: a) at equilibrium with the universe b) at odds with the universe c) higher than that of the universe d) lower than that of the universe 6. Cells provide an environment where: a) compartmentation of reactants, enzymes and processes is allowed. b) cellular reactions are protected from outside disturbances c) biological compounds can be concentrated d) b and c e) a and c f) all of the above
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3 7. Most of the water in our bodies is located where? a) intracellularly b) extraterrestrially c) extracellularly d) interstitially e) in our blood f) it is not located in any of these places 8. When one dissolves sodium chloride in water, a) the Na + is attracted to the O of water and the Cl - is attracted to the H b) the Na + is attracted to the H of water and the Cl - is attracted to the O c) the Na + is attracted to the O of water and the Cl - is also attracted to the O d) the Na + is attracted to the H of water and the Cl - is also attracted to the H 9. K w is a) equal to [H + ] [OH - ] b) the ionization constant of water c) equal to 10 -14 d) shows a low degree of ionization e) b and c f) all of the above
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4 10. The pH of blood is 7, so the [H + ] in blood is in the: a) Molar range b) Millimolar range c) Micromolar range d) Nanomolar range e) Picomolar range f) Femtomolar range 11. Enzymes are active at a) active at all pH’s b) have an optimal pH c) pH is irrelevant d) all of the above e) none of the above 12. The Henderson-Hassalbalch equation a) is an equation to equate ion concentration and temperature b) relates pH and pKa c) relates pH and the ratio of conjugate base to acid d) relates concentration to absorbance e) b and d f) b and c
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5 13. If the pH of a buffer is 5.7 and the pKa of the acid in the buffer is 4.7, what is the ratio of the acetate conjugate base to acetic acid in this solution? a) 1.2
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Exam_1_S08 - 1. The side chains of the amino acids found in...

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