-1-BIOS 100 - Summer, 2011 Name:Exam I, 29 June, 2011Michael Muller, Instructor TA:This exam consists of 51 questions spreading like the plague over nine pages. Each question isworth 5 points. Please check to see that all the pages are present before you begin. Use a #2pencil and bubble in all answers. There is a copy of the periodic table at the end of the exam. Yourscore will be posted on the UIC Blackboard site as soon as they are in. Good Luck!1. A spectrophotometer can be used to determine the population density of a colony of bacteriagrown in aqueous medium. I gave you a standard curve showing the relationship betweenpopulation density of an E. coli colony and absorbance. I then gave you the absorbancevalue of a colony of E. coli grown in the lab and ask you to determine the populationdensity. What type of learning is required to answer this question?A. Lower-level learning (remembering & understanding)B. Higher-level learning (analyzing & applying)C. Higher-level learning (creating & evaluating)D. None of the above2. Which of the following activities provides the least amount of long-term recall?A. Lectures D. ReadingB. Teaching others E. Audio-visualC. Practice by doing3. Which of the following statement (A-D) about science and the process of science is FALSE? Ifstatements A-D are true, then choose EA. Science is an evolving field - the state of our knowledge is constantly changingB. Science should be respectful to one’s personal beliefs. Theories that are difficultto understand and/or controversial and can be readily disregardedC. Scientific hypothesis are based upon previous knowledgeD. A scientist can never prove anything to be true; they can only demonstrate that theirhypothesis is robust by extensively testing it and failing to disprove their hypothesisE. All of the above statements about the process of science are TRUE4. How does the word “theory” in science differ from its use in everyday English?A. There is no difference—the usages are interchangeable.B. A scientific theory is always right and never changes.C. Scientific theories are testable explanations based on much experimental data,not speculative guesses.D. A scientific theory can be confirmed by a single experiment designed to prove itsaccuracy.E. None of the above5. How many covalent bonds would you expect the element Sulphur (S - atomic number 16) tobe able to make?A. 0 B. 1 C. 2 D. 3 E. 46. In which of the following molecules is the central carbon the most oxidized?-2-43322A. CH B. CH OH C. CH NH D. CO E. None of the above7. To which of the below molecules will water have no polar attraction?33224A. CH B. CH OH C. CH NH D. CO E. None of the above8. Which of the following statement (A-D) about water is FALSE? If statements A-D are true,then choose EA. Your body is about 70% water B. Water has boiling point at a much higher temperature than other molecules of roughlyequal molecular massC. Water is very resistant to temperature change when compared to molecules of roughlyequal molecular massD. Solid water is more dense than liquid waterE. All of the above statements about water are TRUE9. How many of the below reactions are examples of condensation reactions?I. Peptide bond formation6126 2 2 2II. C H O + O >> 6 CO + 6 H OIII. The formation of a phosphodiester bond between two nucleotidesIV. glucose + fructose >> sucroseA. None B. One C. Two D. Three E. Four10. The molecule pictured below is an example of a(n):A. PolysaccharideB. LipidC. ProteinD. Nucleic AcidE. None of the above11. The structure indicated in the picture below is most likely an example of protein:A. Primary structureB. Secondary structureC. Tertiary structureD. Quaternary structureE. None of the above-3-Use the key below to answer questions 12 - 13I. Adenine III. Uracil V. CytocineII. Guanine IV. Thymine12. How many of the above nucleotides are purines?A. None B. One C. Two D. Three E. Four13. Which of the above nucleoties is not found in DNA?A. Adenine B. Guanine C. Uracil D. Thymine E. Cytocine14. What is the primary difference between the ribose of a deoxynucleotide (DNA) and the riboseof a ribonucleotide (RNA)?A. The ribose of RNA has an -OH group on the 2' carbon and is more stable than DNAB. The ribose of RNA has an -OH group on the 2' carbon and is less stable than DNAC. The ribose of DNA has an -OH group on the 2' carbon and is more stable than RNAD. The ribose of DNA has an -OH group on the 2' carbon and is less stable than RNAE. None of the above15. Which of the following statement (A-D) about phospholipids is FALSE? If statements A-Dare true, then choose EA. Phospholipids are amphipatic moleculesB. Phospholipids will spontaneously form micelles and lipid bilayers when placed inaqueous solutionC. Phospholipids have positively charged heads and hydrophobic tailsD. A phospholipid with all single bonds in the fatty acid tail is called a saturated fatE. All of the above statements about phospholipids are true16. Which of the following graphs represents the relationship between enzyme activity as afunction of ambient pH in an enzyme-catalyzed reaction?A B C D-4-17. Why are most biologically important molecules polymers?A. Monomers are very unstable, which makes them highly reactive and easy to formpolymersB. Polymers are simple moleculesC. Each polymer has a common bond type joining each monomer. This makes iteasy to mix and match to create a large number of different moleculesD. The monomers are energetically cheap to produceE. None of the above18. The structure of ATP is most similar to what type of molecule?A. Amino acid B. Sugar C. Nucleotide D. Tri-glyceride19. The graph below represents the relationship between enzyme activity and substrateconcentration. Why does the graph have this shape?A. Enzymes break down when substrateconcentration gets too highB. High substrate concentrations create conditionswhich promote self competitive inhibitionC. High substrate concentrations can denature theenzymeD. Enzymes saturate at high substrateconcentrationE. None of the above20. The Krebs cycle is involved in cellular respiration and ultimately produces ATP. Studies haveshown that the first enzyme in this cycle, citrate synthase, works well when ATP levels arelow but activity slows down when ATP levels are high (substrate concentrations are kepthigh in all of the above examples). What is the best explanation for these