-1-BIOS 100 - Fall, 2008pm Name:Exam I, 15 Sept, 2008Michael Muller, Instructor TA:This exam consists of 52 questions over 7 pages (the last page of which has the periodic table). Pleasecheck to see that all the pages are present before you begin. Use a #2 pencil and bubble in all answers. Your score will be posted on the UIC Blackboard site as soon as they are in. You will gain four extracredit points if you bubble in your last name first. Good Luck! 1. I was playing around with the Hadron Collider and I accidentally knocked a proton out of thenucleus of a nitrogen atom. What will happen to the nitrogen atom?A. It will become an ion B. It will become an isotopeC. It will become Carbon D. It will become OxygenE. It will become a black hole and destroy the world2. How many covalent bonds would you expect Selenium (Se, atomic number 34) to make?A. 0 B. 1 C. 2 D. 3 E. 43. What is the difference between Cl and Cl ?-A. The number of protons B. The number of neutronsC. The number of electrons D. A & BE. B & C4. Which element is the most electronegative?A. Li B. B C. C D. O E. Ne5. Which of the following statements (A - D) about water is FALSE? If statements A-D are true,then choose E.A. Water is a very polar molecule - most of the unique properties of water are due to thisfactB. Water has a very high heat of vaporizationC. Water has a high specific heat capacity, which is largely responsible for the “LakeEffect” you hear about so much when they show the weather on the TV newsD. Water has a strong surface tensionE. All of the above statements about water are TRUE6. Which solution is most basic (alkaline)?A. Lemon juice (pH 2) B. Coffee (pH 5) C. Pure water (ph 7)D. Milk of Magnesia (pH 10.5) E. Bleach (pH 12.5)7. To which molecule/ion would water be most attracted?614 2 3 2A. C H B. H O C. NH D. CH OH E. H+8. In which molecule is the carbon most reduced?423A. CH B. HCN C. CO D. CH OH9. What type of bond joins two amino acids in a protein?A. Amino bond B. Peptide bond C. Protein bond D. James Bond-2-10. The molecule below is an example of a(n):A. Protein B. Nucleotide C. Lipid D. Polysaccharide11. Which of the following are purines?A. Adenine B. Guanine C. Cytosine D. ThymineE. A & B12. There are twenty amino acids found in proteins. What distinguishes these molecules fromeach other?A. The location of their carboxyl and their amino groupsB. Their ability for form peptide bondsC. The composition of their R-groupsD. The number of carbon atoms in their backboneE. None of the above13. What is responsible for the stabilization of a protein secondary structure?A. The sequence of amino acids in the proteinB. Polar bonds that form between the carboxyl and amino groups of the proteinbackbone.C. Polar bonds formed between the R-groupsD. The arrangement of protein subunits in the functional proteinE. None of the above14. Which of the following statements (A-D) about phospholipids is FALSE? If statements A-Dare true, then choose EA. Phospholipids are a form a glycerideB. Phospholipids are amphipathic moleculesC. Phospholipids will spontaneously form a lipid bilayer when placed in waterD. Phospholipids are the primary component of a biological membraneE. All of the above statements about phospholipids are TRUE.15. The formation of a phosphodiester bond joining the nucleotides in a DNA chain is anexample of what type of reaction?A. Condensation B. Hydrolysis C. NucleophilicD. Monomeric E. None of the above16. ATP most closely resembles what type of molecule?A. A nucleotide B. An amino acid C. A steroidD. A glyceride E. A disaccharide-3-17. Which of the following graphs represents the relationship between reaction speed as afunction of ambient temperature in an enzyme-catalyzed reaction?A B C D18. All of the organisms below contain a version of the enzyme carboxylic anhydrase. In whichoptorganism would you expect to find the enzyme with the lowest T ?A. An archaean found in a hot spring B. A HumanC. An oak tree D. A FlyE. A snake19. Which of the following statements (A-D) about enzymes is FALSE. If statements A-D aretrue, then choose E. A. Enzymes temporarily bind to the substrates, forming an enzyme-substrate complexB. Enzymes function by lowering the activation energy of a reactionC. Enzymes catalyze both the forward and reverse reactions, but they always catalyze theforward reaction moreD. Enzymes can saturate - at this point, adding more substrate will not increase enzymeactivityE. All of the above statements about enzymes are TRUE20. What is a competitive inhibitor to an enzyme-catalyzed reaction?A. A molecule not involved in an enzyme catalyzed reaction but can bind to the activesite of the enzymeB. A molecule which destroys one of the substrates of an enzyme-catalyzed reactionC. A molecule which binds to an allosteric site of an enzyme, turning it offD. A molecule which binds to an allosteric site of an enzyme, turning it onE. None of the above21. Which of the following statements (A-D) about the enzyme system that converts threonine toisoleucine is FALSE? If statements A-D are true, then choose E.A. This system is an example of feedback inhibitionB. Isoleucine can bind to the active site of threonine deaminaseC. The concentration of isoleucine can affect the activity of threonine deaminaseD. The enzyme threonine deaminase has two conformations, only one of which will bindto the substrate, threonineE. All of the above statements about the enzyme system that converts threonine toisoleucine are TRUE-4-22. When a substrate binds to an enzyme:A. It is a perfect fitB. It is an induced fitC. It must be guided into the active site by allosteric ligandsD. It requires ATP hydrolysisE. None of the above23. Which of the following is NOT a component of the Cell Theory of Life?A. All organisms are composed of cells B. The cell is the structural unit of life - units smaller than cells are not alive C. Cells arise by division of preexisting cells - spontaneous generation does not exist D. Cells can be cultured to produce more cells E. All of the above are components of the Cell Theory of Life24. What is the function of an Nuclear Localization Signal (NLS)?A. It aids nucleoli in ribsosome synthesisB. It marks proteins for destruction by the lysosomeC. It marks proteins for import or export from the nucleusD. It helps enzymes find the nucleusE. None of