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You may need a Periodic Table (included with your textbook), a scientific calculator, and a notebook to complete this Exam. 1) Molecule below best represents: A) amylopectin B) DNA C) amylose D) RNA 2) Which of the following is a secondary alcohol? A) B) D) none of these 3) In the Benedict's test: A) a positive result is indicated by the solution turning blue B) a negative result is indicated by the solution turning red C) negative result means no reducing sugars are present D) positive result means starch is present 4) Which of the following is the storage form of glucese in the liver and muscle tissue? A) Amylose B) Amylopectin C) Glycogen D) Cellulose
5) Which blood type can accept donor blood types A, B, O, and AB ? A) A B) B C) O D) AB 6) A sample of air at a pressure of 1.50 atm occupies 2.75 L at 35∘C. Calculate the new pressure when the temperature is raised to 115∘C and the volume is changed to 5.50 L. A) 0.321 atm B) 0.945 atm C) 1.06 atm D) 3.78 atm 7) The predominant intermolecular force between molecules of acetone is: A) London-dispersion forces B) ion-dipole attractions C) hydrogen bonding D) dipole-dipole attractions 8) Which of the following compounds will have the highest boiling point? A) CH3CH2OH B) NH3 C) CHCl3 D) CH4 9) In a cell wall lipid bilayer, A) phosphate groups are facing each other B) phosphate groups are hydrophobic C) hydrocarbon tails are facing each other D) hydrocarbon tails are hydrophilic 10) In which of the following solutions would increasing temperature always decrease solubility? A) Solution of a gas in a liquid B) Solution of a solid in a liquid C) Solution of a liquid in a liquid D) Solution of a solid in a solid
11) Which of these is a strong electrolyte? A) N2​ B) CH3​COOH C) HNO3​ D) CO2​ 12) How many equivalents of SO4​2− are present in a solution that contains 3.15mmol of SO42​ ? A) 2.91meq B) 6.30meq C) 6.30cq D) 11.6meq 13) What is the molarity of a solution formed by dissolving 15 g NaOH in water to give a final volume of 300 mL ? A) 0.0125M B) 0.18M C) 1.25M D) 9.0M 14) How much water must be added when 125 mL, of a 2.00M solution of HCl is diluted to a final concentrations of 0.500M ? A) 125ml. B) 500 mL. C) 375 mL D) 750 mL. 15) Which of the following statements is nof true when describing what happens to a cell with a concentration of 2.5% m/vNaCl is placed into a solution with a 0.9% m/vNaCl. A) The cell solution has the higher osmotic pressure. B) Water flows into the cell from the surrounding solution. C) The cell expands. D) The surrounding solution has a higher osmotic pressure. 16) In this equilibrium, which is the correct statement describing what happens when [H3+] increases? A) Equilibrium shifts left and pH increases B) Equilibrium shifts left and pH decreases C) Equilibrium shifts right and pH increases D) Equilibrium shifts right and pH decreases
17) Which of the following substances, when added to a solution of acetic acid ( CH,COOH), could be used to prepare a buffer solution? A) NaOH B) KNO2​ C) CH3​COONa D) HNO3​ 18) Which of these solutions is the most basic? A) [OH−]=2×10−6M B) [OH−1=3×10−4M C) [113O+]=4×10−10M D) [H3O+]=6×10−9M 19) A noncompetitive inhibitos: A) changes the shape of the enzyme by attaching clsewhere than the active site B) occupies the enzyme"s active site C) denatures the enxyme D) is irreversible 20) A molecule that is similar in terms of the correct structure to the substrate for an enzyme will probably be a: A) cofactor B) regulator C) competitive inhibitor D) noncompetitive inhibitor 21) Which of the following is an cxample of a messenger protein? A) Hemoglobin B) Estrogen C) Pepsin D) Collagen 22) Sequence of amino acids represents stracture of a protein. A) Primary B) Secondary C) Tertiary D) Quatemary 23) What type of bonding holds the double strand of DNA together? A) Covalent bonding B) lonic bonding C) Hydrogen bonding D) Disulfide bridges
24) The sequence of bases in a DNA template is 5'ACATGCAT3". What is the correct sequence in the corresponding mRNA strand? A) 3'UGUACGUA5' B) 5'UGUACGUA3' C) 3'TGTACGTA5' D) 5'TGTACGTA3' 25) Amino acids are carried to the ribosomes for translation by which type of RNA? A) Messenger RNA B) Ribosomal RNA C) Viral RNA D) Transfer RNA