Before filling in your name and PeopleSoft-ID, please check that the color of your scantron sheet matches thecolor of your test. In column J of the scantron sheet blacken the circle corresponding to the color of yourexam: white = 1; blue = 2; pink = 3; yellow = 4. Proceed with the exam, choosing the best answer for eachof the following questions and blackening the proper circle on the answer sheet with a Number 2 pencil.Read each question carefully before marking the best answer on your scantron sheet.Work thoughtfully.Make educated guesses if necessary. Even wild guessing throughout should net you 20% of the total points,on the average. PLACE THE ANSWER SHEET IN ITS OWN COLOR PILE when you are doneFoundations of Biology - IFoundations of Biology - I1st EXAMINATIONWHITEFall Term 2010 - Dr. Laurel RobertsBIOSC 0160 CRN# 12336carbonic acid formation increasesH+ release increaseslasma pH decreases Both A & BA, B and Ca.b.c.d.e.1--XWhen you hold your breath, which of the following occurs?2, 2 2, 3 2, 63, 23, 6a.b.c.d.e.2--XConsider the bonding of 3 water (H2O) molecules. For every ___ hydrogen bonds there would be ___ covalent bonds.the concentration of lipids would increasethe concentration of proteins would increasethe concentration of water within the cell would increasethe concentration of water within the cell would decreaseNone of the other answers is correcta.b.c.d.e.3--XSuppose that extraordinary circumstances caused a cell to rapidly digest a large number of macromolecules. Which of the following would be true?positively charged. negatively charged. neutral in charge. hydrophobic. nonpolar. a.b.c.d.e.4--XBased on your knowledge of the polarity of water, the solute molecule in this figure is most likely OneTwoThreeFourSixa.b.c.d.e.5--XA single covalent chemical bond represents the sharing of how many electrons?they pump water across the cell membranethey are constructed by the formation of peptide bondsthey are assembled at ribosomesBoth B and C are trueA, B and C are all truea.b.c.d.e.6--XWhich of the following is true about aquaporins?Page 2WHITEadhesioncohesionheat of vaporizationspecific heathumiditya.b.c.d.e.7--XDr. Roberts loves her coffee. What property of water prevents the molecules from leaving the coffee mug as individuals instead of as a stream of rich, robust yumminess? desmosomes and gap junctions contain keratin, whereas tight junctions have collagen.gap junctions and tight junctions have specialized protein channels called connexons; desmosomes do not.tight junctions and desmosomes have mechanical roles, whereas gap junctions facilitate communication between cells.desmosomes and gap junctions are found in epithelial tissue, whereas tight junctions are found in nerve cells.they all have different functions; however, their structure is the same.a.b.c.d.e.8--XThe difference between tight junctions, desmosomes, and gap junctions is thationspolar covalent bonds. nonpolar covalent bonds. equal numbers of isotopes. ionic bonds. a.b.c.d.e.9--XWhen two atoms are equally electronegative, they will interact to form In the interior of a cytoplasmic enzymeOn the exterior of a protein embedded in a phospholipid bilayerOn the exterior of a protein interacting with the cytosolBoth a and bBoth a and ca.b.c.d.e.10--XThe side chain of Lysine contains an amino group. In a folded protein in a cell, where would you expect to find lysine?Hypotonic; the bag will shrink and shrivel because the water will flow from the bag into the surrounding NaCl solution. Hypertonic; the bag will shrink and shrivel because water will flow from the bag into the surrounding NaCl solution.Hypotonic; the bag will swell and possibly burst because the water will flow into the bag from the NaCl solution.Hypertonic; the bag will swell and possibly burst because the water will flow into the bag from the NaCl solution.There is no way to tell because the system contains two different solutions (glucose and NaCl).a.b.c.d.e.11--XA cellulose bag (which is permeable to only water molecules) contains a 300 M glucose solution. This bag is placed in a 500 mL beaker containing a 150 M solution of NaCl. Within this system, is the solution of glucose within the bag hypotonic, hypertonic, or isotonic relative to the solution in the beaker? And what is the most likely outcome?Page 3WHITEAnimal cells produce chloroplasts.Mitochondria and chloroplasts may be found in the same cell.Mitochondria and chloroplasts are not found in the same cell.Chloroplasts can revert to mitochondria in certain conditions.All of the abovea.b.c.d.e.12--XWhich of the following statements is true regarding mitochondria and chloroplasts?nucleotidesfatty acidsamino acidsmonosaccharidestriacylglycerola.b.c.d.e.13--XThe enzyme lactase, which digests lactose into glucose and galactose, is composed of what kind of building blocks?3, 2! 3, 34, 2 3, 44, 3a.b.c.d.e.14--XAfter the formation of the peptide bond, carbon has ___ bonds while nitrogen has ___..Separating a cell from its environmentSelecting what goes into and out of the cellMaintaining a constant internal environmentCommunicating with adjacent cells All of the abovea.b.c.d.e.15--XThe roles of biological membranes in eukaryotic cells include which of the functions listed below?in the same direction as diffusion moves them.in the opposite direction in which diffusion moves them.in a direction that tends to bring about equilibrium.toward higher pH.toward higher osmotic potential.a.b.c.d.e.16--XActive transport usually moves moleculesNucleic acidsCarbohydratesProteinsEnzymesLipidsa.b.c.d.e.17--XYou're given Compound X and told that it is a macromolecule. You discover that it is soluble in gasoline, but it is not soluble in water. Based on this information, what class of biological macromolecules does Compound X belong to?Page 4WHITEincreased number of ribosomes on her endoplasmic reticulumincreased size of the nucleiincreased amount of smooth endoplasmic reticulumdecreased amount of smooth endoplasmic reticulumdecreased number of ribosomes on her endoplasmic reticuluma.b.c.d.e.18--XBecause of a chronic disease, Sarah has had to take numerous prescription drugs most of her life. How would you expect the structures of her liver cells (hepatocytes) to differ from normal?help hold a membrane together.transport ions across membranes.attach to carbohydrates.disrupt membrane function.alter the fluidity of the membrane.a.b.c.d.e.19--XCholesterol molecules act toIt has the same numbers of