BIO311c Sample Exam 1 K. Sathasivan 1 BIO 311c Introductory Biology I K. Sathasivan SAMPLE'EXAM'1'''Total Points = 70 Part A. Multiple Choice Questions Read each question carefully and completely before you select the best answer for questions 1-25 and fill in the appropriate blank in the scantron form with a #2 pencil. Each question is worth 2 points for a maximum of 50 points. 1) Which of the following example correctly represents the biological hierarchy of organization? A) atoms - molecules - trunk - muscles -amino acids - proteins B) elephant - trunk - muscles - amino acids - proteins - atoms C) atoms - amino acids- proteins - cells - muscle - trunk - elephant D) muscle - amino acids- proteins - mitochondria- muscle - trunk E) atoms - muscles - mitochondria - proteins - elephant - trunk 2) When the water molecules evaporate to cool your body, which of the following bond/interaction is broken? A) hydrophobic interaction B) ionic bond C) nonpolar covalent bond D) hydrogen bond E) polar covalent bond 3) Which of the following is the correct ranking of the three bonds and interactions in order from highest to lowest in terms of their bond strength between two side chains of a protein in their tertiary structure? I. Disulfide bond between two cystines II. Hydrophobic interactions between two leucines III ionic bonding between positive and negatively charged amino acids A) I, II, III B) II, III, I C) III, II, I D) I, III, II E) III, I, II 4) Nitrogen and oxygen are much more electronegative than hydrogen. Which of the following statements is correct about the interactions between ammonia and water? The ammonia and water molecules will interact and form ____________________ between each molecule. A) polar covalent bonds B) non-polar covalent bonds C) ionic bonds D) hydrogen bonds E) hydrophobic interactions 5) The molecular mass of glucose is 180 g/mole. How will you make 0.25 M glucose solution? A) Dissolve 180 g of glucose in 4L of water. B) Dissolve 18 g of glucose in a small volume of water, and then add more water up to 400 ml. C) Dissolve 180 g of glucose in a small volume of water, and then add more water up to 500 ml. D) Dissolve 45 g of glucose in a small volume of water, and then add more water up to 2 L. E) Dissolve 250 g of glucose in a small volume of water, and then add more water up to 500 ml.BIO311c Sample Exam 1 K. Sathasivan 2 6) How many grams of the molecule shown in Figure 1.2 is needed to make 100 ml of 2M solution? (Mass of Carbon = 12, Oxygen = 16, Hydrogen = 1) Figure 1.1 A) 342 B) 30 C) 150 D) 60 E)12 7) A solution contains 0.001 moles of hydrogen ions [H+] per liter. Which of the following best describes this solution? A) pH 3: acidic, H+ acceptor B) pH 11: basic, H+ acceptor C) pH 3: acidic, H+ donor D) pH 7: neutral, H+ donor and acceptor E) pH 10: basic: H+ donor 8) When the amino acid glycine with H in its side chain is placed in water it A) would function only as a base because of the amino group. B) is impossible to determine how it would function. C) would function as neither an acid nor a base. D) would function as both an acid and a base. E) would function only as an acid. 9) You are trying to label (attach a tag) to only proteins and not other molecules such as DNA, RNA or carbohydrates, in a bacterial cell. Which of the following radioactive compound you can add to the culture media to label only proteins? A) radioactive nitrogen B) radioactive uracil C) a radioactive hydrocarbon such as benzene D) a radioactive sulfur E) a radioactive hydrogen Use the following Figure 1.2 to answer the following two questions. Figure 1.2 10) Which molecule can be bonded to another molecule to make an ester bond? A) A and B B) C and D C) D and E D) A and D E) C and A 11) Which two molecules, if combined to make one molecule, would make a buffer? A) A and C B) B and D C) D and E D) A and E E) C and D 12) Which of the following best summarizes the relationship between condensation synthesis reaction and hydrolysis?BIO311c Sample Exam 1 K. Sathasivan 3 A) Condensation synthesis can occur only after hydrolysis. B) Hydrolysis creates monomers, and condensation reaction breaks down polymers. C) Hydrolysis occurs in kidney and condensation reaction occurs in digestive tract. D) Condensation reaction assembles polymers, and hydrolysis breaks down polymers. E) Condensation reactions utilize water, and hydrolysis forms water. Use the Figure 1.3 to answer the following two questions. Figure 1.3 13) If 10 molecules of the general type shown in Figure 1.3 were covalently joined together by condensation synthesis to form a decamer, the molecular formula of the resulting molecule will be A) C10H12O6 B) C60H120O60 C) C60H110O51 D) C60H102O51 E) C51H120O60 14) If the molecule shown in Figure 1.3 is used to make a polymer and stored in your liver, the molecule would be__________. A) glucose. B) cellulose. C) starch. D) amylose E) glycogen. 15) When you are scrambling an egg for breakfast, in which order you will be breaking the bonds in the protein and lipid molecules in the egg? Not all bonds and molecules may be included in the choices given below. A) Peptide/ester bonds first and then hydrogen bonds followed by hydrophobic interactions. B) Hydrogen bonds and then hydrophobic interactions followed by Van der Waals forces. C) Ionic bonds and then peptide/ester bonds and then hydrogen bonds. D) Van der Waals forces and then ionic bonds followed by peptide/ester bonds. E) Hydrophobic interactions and then peptide/ester bonds followed by hydrogen bonds. 16) Which of the following list includes the components of the monomers used to make DNA and RNA? A) a nitrogenous base and a phosphate group B) a nitrogenous base and a pentose sugar C) a pentose sugar and a purine or pyrimidine D) a phosphate group and an adenine or uracil E) a nitrogenous base, a phosphate group, and a pentose sugarBIO311c Sample Exam 1 K. Sathasivan 4 Figure 1.4 17) The structure shown in Figure 1.4 is a/an _______________, which is _________________ in water. A) amino acid, soluble B) cellulose, insoluble C) steroid, soluble D) steroid, insoluble E) phospholipid, partly soluble Use the Figure 1.5 to answer the following question. Figure 1.5 18) The chemical reaction illustrated in Figure 1.5 results in the formation