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exam2+summer94

exam2+summer94 - 1 The citric acid cycle takes place in...

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Unformatted text preview: 1. The citric acid cycle takes place in which of the following eucaryotic organelles? . Golgi complex . vesicles . mitochondria . endoplasmic reticulum ribosomes muow> 2. During the breakdown of glucose to carbon dioxide and water, in the presence of oxygen, what happens to the carbon in the glucose molecule? A. the carbon is oxidized to carbon dioxide B. the carbon is reduced to form carbon dioxide C the carbon 18 converted to water D. the carbon gains electrons to form carbon dioxide E. the carbon gains hydrogen to form carbon dioxide 3. Based on the U—tube shown below which of the following statements is correct? Assume that the membrane is impermeable to all solutes. A B 1 molar sucrose 2 molar sucrose semi—permeable membrane . the water on side A has greater entropy than on side B . the water on side A has lower free energy than on side B . the water on side A has lower entropy than on side B . the net movement of water will be from side B to side A the will be no net movement of water wunw> 4. Which of the following molecules is not produced during the citric acid cycle? A. ATP B. FADH2 C . NADH + H+ D. carbon dioxide E. pyruvic acid 5. Cyclic photophosphorylation results 1n the production of? .ATP . NADPH + H+ . oxygen . glucose more than one of the above are produced meow» Page: 1 N 10. 11. Membrane which is part of the endoplasmic reticulum at one time may be incorporated into which of the following structures at some time later? A. mitochondrion B. chloroplast C. Golgi complex D. vesicle E. the membrane may be incorporated into more than one of the above . Besides ATP which of the following molecules is produced during non-cych photophosphorylation? . NADPH + H+ . glucose . PGAL . oxygen more than one of the above are produced wuow> . [In order for osmosis to occur which of the following must be true? A. there must be a semi-permeable barrier between two fluid filled volumes B . there must be material in solution on both sides of the membrane C. water molecules must be allowed to move through the membrane in only one direction D. the membrane must be permeable to the material in solution (solute) E. more than one of the above is correct . The cilia and flagella of eucaryotes conatin 9 pairs of surrounding two single . actin filaments, actin filaments actin filaments, microtubules . microtubules, actin filaments . microtubules, microtubules none of the above e molecule ADP is converted to ATP by: . being reduced . being oxidized . being phosphorylated . undergoing a condensation reaction undergoing a hydrolysis reaction wuow>g munw> How many molecules of ATP are produced via oxidative level phosphorylation for each molecule of pyruvic acid metabolized in the presence of oxygen? A. 10 B. 14 C. 18 D. 20 E. 30 Page: 2 ll 12. In. 14. 15. 16. 17. 18. The C4 and CAM pathways both avoid the problems of photorespiration be making available to the chloroplasts undergoing photosynthesis. . water . sunlight . glucose . oxygen carbon dioxide 6 source of electrons for photosystem II is: . water . oxygen . carbon dioxide . glucose P680 wuow>g meow» During exocytosis the membrane surface in contact with the interior of the vesicle becomes: (Hint this is a difficult questions try drawing it out.) A. the interior surface of the cell membrane B . the interior surface of another vesicle C. the exterior surface of the endoplasmic reticulum D. the exterior surface of the cell membrane E. the exterior surface of a lysosome d Bacteria are of interest to biologists for which of the following reasons? This is the exam break question, the answer is "c", more than one of the above. A. they are agents of disease B . they are important components of ecosystems ' C .' they are important in biotechnology D. they are cute E. more than one of the above The reaction center molecule in photosystem I is: . chlorophyll a . chlorophyll b . P700 - . P680 carotenoid e energy rich molecules used in the Calvin-Benson cycle come from: . cyclic photophosphorylation . non-cych photophosphorylation . cyclic and non-cyclic photophosphorylations . CFl complexes chemiosmotic gradient wcow>g munw> Which of the following structures is found in bothprocaryotes and eucaryotes? . nucleus . . endoplasmic reticulum . mitochondrion . microtubules ribosomes wonw> Page: 3 B 19. You discover a super efficient species. It has a modified electron transport chain in its 20. 21. 22. 23. 24. mitochondria. As electrons pass from NADH + H+ to oxygen they pass 5 prOton pumps and as they pass from FADH2 to oxygen they pass 3 pumps. Assuming the rest of the respiration pathway is unchanged how molecules of ATP do you expect to be produced from each molecule of pyruvic acid in the presence of oxygen? A. 12 B . 18 C. 20 D. 23 E. 29 The plasmodesmata in plant cells are analogous to which of the junctions between animal cells? A. primary . B. intermediary C. desmosome D. tight E. gap Which of the following statements about protons would be correct during photophosphorylation? A. the protons directly capture the energy from the photons of light B . the protons are pumped from inside the thylakoid to outside the thylakoid C. the passage of protons through the CPI complex is exergonic D. the energized protons are incorporated into the newly synthesized ATP E. protons are not involved in photophosphorylations The Calvin—Benson cycle always results in the production of: A. starch ' B . glucose C. cellulose D. lactose E. PGAL The CF 1 complexes in chloroplasts are considered to be . symports, active transport . antiports, facilitated diffusion . antiports, active transport . uniports, facilitated diffusion uniports, active transport moow> Which of the following statements about the cell coat is correct? A. the cell coat is found only in procaryotic cells B. the cell coat is similar in structure to a cell wall C . the cell coat determines what passes into and out of a cell D. the cell coat is composed of glycolipids and glycoproteins E. the cell coat is required for cell motility (movement) and Page: 4 25. 26. 27. 28. 29. 30. 31. During non~cyclic photophosphorylation water is split releasing protons and electrons. The electrons are used to reduce and the protons travel down their free energy gradient through the . A. glucose, photosystem I B. P680, CF 1 complex C. photosystem 2, photosystem I D. photosystem 2, cytochrome b6 E. photosystem I, cytochrome b6 Fermentation of pyruvic acid results in the production of? . ATP . glucose . NAD+ . FADHZ more than one of the above meow» During glycolysis how many molecules of ATP are produced via oxidative phosphorylation for each molecule of glucose metabolized? A. O ' ‘ FPO!” AWN»— 4 Which of the following substances is not resonsible for holding cells together? A. pectin B. permease C. lectin D. collagen E. more than one of the above is not responsible In eucaryotes the photosystems (I and II) are located in: A. the cell membrane B. the inner mitochondrial membrane C. the outer chloroplast membrane D. the thylakoid membrane E. the outer mitochondrial membrane Which of the following molecules is used for localized energy transport? A. glucose B. pyruvic acid C. oxygen D. water E. NAD (nicotinamide adenine dinucleotide) The large network of membrane bound channels within a eucaryotic cell is referred to as‘v'the: A. nucleus B. endoplasmic reticulum C. Golgi complex D. lysosome E. plastid Page: 5 32. 33. 34. 35. 36. 37. 38. One characteristic of cell membranes is that the permeability changes over time. This is the result of changing the in the membrane. A. carbohydrates B. lipids C. proteins D. nucleic acids E. none of the above The cell walls of most organisms are composed largely of? A. carbohydrates B. lipids - C. proteins D. nucleic acids E. none of the above Cell membranes are composed of a phospholipid bilayer with embedded in it. A. carbohydrates B. lipids C . proteins D. nucleic acids . E. none of the above When fatty acids are metabolized they are brokendown into 2 carbon molecules and enter the cellular respiration.pathway as: A. glucose B. pyruvic acid C. ethanol D. acetyl—CoA E. citric acid Beginning with 1 molecule of pyruvic acid how many molecules of ATP are produced during' fermentation? ' A. O ' F190!” 45'.»th During oxidative phosphorylation the energy to drive this endergonic reaction comes from? A. oxygen B. protons passing through the membrane C . electrons passing through the membrane D. the enzymes in the F1 complex B. Coenzyme A The movement of vesicles within a cell is partly due to the presence of: A. plastids B. endoplasmic reticulum C. microtubules D. Golgi complex E. lysosomes Page: 6 Na 39. 40. 41. 42. 43. During diffusion molecules tend to move from areas of to areas of A. low concentration, high concentration B . high entropy, low entropy C. low free energy, high free energy D. high free energy, low free energy E. more than one of the above statements is correct ' A permease that transports one type of molecule down (or with) its free energy gradient would be considered a: . uniport and membrane pump . uniport and facilitated diffusion . symport and membrane pump . symport and facilitated diffusion antiport and membrane pump COD??? Ora utside of the nucleus DNA can be found in which of the following structures? . endoplasmic reticulum . Golgi complex . vesicles . [chloroplast lySosome munw> During cyclic photophosphorylation the energy from the photons of light is captured initially in the form of? 4 A. reduced molecules B. ATP C. PGAL D- energized electrons E. water ' x The Calvin-Benson cycle requires carbon dioxide, ATP, and in order to produce PGAL. A. oxygen B. NADPH + H+ C. water D. light E. P700 In an isolated thylakoid which of the following treaments would increase NADPH + H+ production without increasing ATP production? . increasing the amount of light energy striking the thylakoid . decreasing intrathylakoid pH . increasing intrathylakoid pH . increasing the quantity of CFl complexes none of the above munw> Page: 7 45. Ribosomes function as: munw> . the sites of protein synthesis . as packaging centers . membrane bound channels . permeases components of the cytoskeleton 46. Which of the following statements is correct? meow» . redox reactions always involve the transfer of hydrogen atoms . reductions and oxidations always occur together . reductions involve the removal of electrons from an atom . oxidations always involve the addition of oxygen to an atom more than one of the above is correct 47. Based on the figure below which of be following statements is correct? A. B. C. D. E. A ' B J The molecules on side A have greater entropy. The molecules on side B have less entropy. The molecules on side A have greater free energy. The molecules on side B have greater free energy. More than one of the above staements is correct. 48. In general terms photosynthesis involves carbon dioxide and cellular respiration involves munw> 49. "U munw> glucose. . oxidizing, oxidizing . oxidizing, reducing . reducing, reducing . reducing, oxidizing none of the above uring non-cych photophosphorylation the flow of electrons from photosystem 2 to photosystem is used to: . pump protons across the thylakoid membrane . reduce NADP+ . split water molecules to gain additonal electrons . convert carbon dioxide into PGAL more than one of the above Page: 8 50. In an isolated thylakoid which of the following treatments should increase ATP production? . increasing the intrathylakoid pH . increasing the extrathylakoid pH decreasing the extrathylakoid electron content . increasing the number of CF 1 complexes increasing the amount of water inside a thylakoid wopw> Page: 9 BIOL 1201 Answer Key U D D M m m D m % 1m 1m 1m 1m 1m 19 1m 1% 1m 1% w) 2n M) 2m 20 x) 2m M) 2m 2m 3m 3M 3m 3m 3% 3m %) 3m 3m 3% exam #2 Blue Exam UOW>UO>0waW>anUmomUmanmU>mwnc>mm>mo>o 40) 41) 42) 43) 44) 45) 46) 47) 48) 49) 50) w>caow>mwcuw 42 ...
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