-1-BIOS 100 - Summer, 2007 Name:Exam I, 13 June, 2006Michael Muller, Instructor TA:This exam consists of 52 questions over 7 pages. Please check to see that all the pages are present beforeyou begin. Use a #2 pencil and bubble in all answers. There is a copy of the periodic table at the end ofthe exam. The answer to question 32 is D. Your score will be posted on the UIC Blackboard site as soonas they are in. Good Luck! 1. Which of the following is NOT a part of the process of science?A. Asking questions about the natural world around usB. Developing hypotheses to test these questionsC. Developing models and theories to explain the natural worldD. Disproving your hypothesisE. All of the above are part of the process of science2. Two atoms differ in their number of protons. These two atoms are:A. Isotopes of the same element B. IonsC. Different elements D. Identical to each otherE. Not enough information to determine3. Which of the following statements (A-D) about water is FALSE? If statements A-D are true,then choose E.. A. Water has strong adhesive and cohesive propertiesB. Water has a very high boiling point and freezing point when compared to other similarsized molecules C. Water is a good insulator because it resists changes in temperature D. Water is a very polar moleculeE. All of the above statements about water are TRUE4. Water cohering to other water molecules is an example of _________ bonds.A. covalent B. ionic C. polar (hydrogen)5. The structure of a NaCl crystal is maintained by ___________ bonds.A. covalent B. ionic C. polar (hydrogen)6. In which of the following bonds is the hydrogen the most oxidized?A. C-H B. H-H C. O-H D. N-H E. A & B7. An acid:A. Donates a proton B. Accepts a proton8. Which element in the list below is least electronegative?A. H B. Be C. C D. O E. Cl-2-9. Which of the following questions about biological polymers is FALSE? If statements A-Dare true, then choose E.A. Biological polymers are typically formed via condensation reactions and are brokenapart via hydrolysisB. Most biological polymers have the monomers joined together by a common bondtype, thus requiring few enzymes to create many different moleculesC. The synthesis and break down of biological polymers are both exergonicD. Biological polymers include polysaccharides, proteins, and nucleic acidsE. All of the above statements about biological polymers are TRUE.10. The molecule illustrated below is a(n):A. MonsaccharideB. GlycerideC. Amino AcidD. Nucleotide11. A portion of a protein is stabilized by many hydrophobic interactions between many nearbyamino acids. This is an example of protein __________ structure.A. Primary B. Secondary C. Tertiary D. Quaternary12. The manner in which the actin subunits are joined together to make a microfilament is andexample of protein ________ structure.A. Primary B. Secondary C. Tertiary D. Quaternary13. Which biomolecule is most common in cells?A. Polysaccharides B. Proteins C. Lipids D. Nucleic Acids14. How are amino acids joined together?A. Peptide bonds B. Phosphodiester bonds C. Amino linkagesD. Proteinaceous bonds E. None of the above15. A steroid is an example of a:A. Polysaccharide B. Protein C. Lipid D. Nucleic Acid16. Which of the pairs below are both pyrimidines A. A & G B. A & T C. C & T D. G & T E. C & A17. Which of the following statements (A-D) about enzymes is FALSE. If statements A-D aretrue, then choose E. A. Enzymes function by lowering the activation energy of a reactionB. Enzymes temporarily bind to the substrates, forming an enzyme-substrate complexC. Enzymes catalyze the forward and reverse reactionsD. The substrate does not perfectly bind to the active site - this is known as an induced fitE. All of the above statements about enzymes are TRUE-3-18. Which of the following statements (A-D) about ATP is FALSE. If statements A-D are true,then choose E. A. ATP is basically a modified nucleotide with three phosphate groupsB. ATP is the universal energy molecule of all life on earthC. The phosphate bonds in ATP are very stable bondsD. ATP can be broken down to form ADP and energy. ADP can be further broken downto form AMP and still more energyE. All of the above statements about ATP are TRUE19. Carbonic anhydrase is an enzyme found in your blood. What would you propose is the bestestimate of its temperature optimum?A. 85ºF (29.5ºC) B. 98.6ºF (37ºC) C. 106ºF (41ºC) D. 120ºF (50ºC)20. The pH of blood is 7.4. What would you propose is the best estimate of the pH optimum ofcarbonic anhydrase?A. 6 B. 7 C. 7.4 D. 7.9 E. 1021. Which of the graphs below represents enzyme activity as a function of temperature:A B. C.22. 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 negative feedbackB. Threonine deaminase has both an active site and an allosteric siteC. 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 TRUE23. Peroxidase is an enzyme found in both plants and animals. Which of the followingorganisms would you expect to have a form of peroxidase with the greatest Topt?A. A rat B. A pine tree C. A snake D. An owl24. Plant cells contain mitochondriaA. True B. False-4-25. Which of the following is NOT a part of the endomembrane system?A. Plasma membrane B. Outer nuclear membrane C. Golgi apparatusD. Chloroplast E. Plant central vacuole26. Which organelle is incorrectly matched with its function?A. Mitochondria - site of cellular respirationB. Rough ER - synthesis of ribosomesC. Central vacuole - storage and maintenance of turgor pressureD. Smooth ER - synthesis of lipidsE. Gogli apparatus - packaging and distribution of proteins 27. Which is not a function of the cytoskeleton?A. Contractile movementB. Establishment and maintenance of turgor pressureC. Maintaining cell shapeD. Anchorage of enzymes and organellesE. All of the above are functions of the cytoskeleton28. What is the function of the nucleolis?A. Regulation of cell division B. Protein synthesisC. Protection of the DNA D. Synthesis of ribosomesE.
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