BIOL 1201 Exam 2 Fall07

BIOL 1201 Exam 2 - Biology 1201-6 Exam 2 16 October 2007 Read each question carefuin before answering Make sure that your name(LAST NAME FIRST and

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Unformatted text preview: Biology 1201-6, Exam 2, 16 October 2007 Read each question carefuin before answering. Make sure that your name (LAST NAME FIRST) and student ID number are on the answer sheet and the circles are filled under M. At the end of the test, turn in the answer sheet and keep your copy of the exam. Answers wilfbe gested in SemesterBook. Your grade will also be posted in SemesterBooIe Chapter 6 F or thefofiowz‘ng questions, we the Iez‘tered anewers {0 match {fie structure to its proper cell type. Choose {he most inciusive category. Each answer may be used once, more than once, or no! at ail. A. a feature of at} ceiis 33, found in prokaryotic cetls only C. found in emryozic celis only D. found in plant cells oniy E. found in animai coils only I) pkasma membrane A 2) ribosome A 3) endopiasmie reticulum C 4) plasmodesmata D 5) no nueieus B 6) Which ofthe foiiowing organeiies is not a common destination for smaii vesicles that bud of? the Golgi. apparatus? A) plasma membrane B) Eysosomes C) vacuoie *D) endoplasmic reticulum E) all of the above 7) Which type oforgaoefle is primariiy invoived in the synthesis ofoiis, phospholipiefis, and steroids? A) ribosome SB) lysosome ="(3) smooth endoplasmic reticulum D) mitochondrion E) contractiie vacuoEe 8) Which of the following (:63? components is not direcrfy invoived in synthesis or secretion? A) ribosome B) rough endopiaemic reticuium C) Golgi body D) smooth endoplasmic reticuium *E) lysosome 9) Orgenelles other than the nucleus that contain DNA inciode A} ribosomes. B.) miiochondrie. C) ehioreplasts. *D) B and C onEy E) A, B, and C Chapter 7 F or ihefoli’owing questions, match the labeled component ofthe eel! membrane (Figure .711) with its description. 18) Cholesterol C E I) Phospholipid E 12) integral protein A 13) Mierofilament of the cytoskeleton B 14) Oligosaccharide D 15) All of the following are functions of integral membrane proteins except *A) protein synthesis. 8) active Bensport. C) hormone reception. D) cell adhesion. E) cytoskeleton attachment 16) which ofthe fol-lowing is a reasonable explanation for Why unsaturated fatty acids help keep any membrane more fluid at lower temperatures? *A) The double bonds form a kink in the fatty acid tail. forcing adjacent iipids to be furthei' apart. 8} Unsaturated fatty acids have a higher cholesterol content. C) Unsaturated fatty acids permit more water in the interior ofthe membrane. D) The double bonds block interaction among the hydrophilic head groups of the lipids. E) The double bonds result in a shorter fatty acid tail. l7) Celery stalks that are immersed in fresh water for several hours become stif? and. hard. Similar stalks lefi in 3 salt solution become limp and soft From this we can deduce that the cells ofthe celery stalks are A} hypotonie to both flesh water and the salt solution. B) hypertonie to both fresh water and the salt solution. *C) hypertonie to fresh water but hypotooie to the salt solution. B) hypotonic to fresh water but hypertonie to the salt solution. if.) isotonic with fresh water but hy'potonie to the salt solution. l8) All of the following membrane activities require energy fiom ATP except *A} facilitated diffusion. 8) active transport. C) Ns’ ions moving out ofthe eeii. D} proton pumps. E) trensiocation of potassium into 3 Gel}. Chapter 8 19} Which term most preciseiy describes the ceilular process of breaking down iarge moiecules into smaiier ones? A) cataiysis B} metabolism C.) anaboiism D) dehydration *E) cataboiism 20) Which of the following is (are) true for anabolic pathways? A} They do not depend on enzymes. B) "Fhey are sight-y reguiated sequesces ofchemicai. reactions. C) They consume energy to ouiid up polymers from monomers. 1)) They release energy as they degrade polymers to monomers. *E) both B and C 2i) Which of the foliowirig is true for of! exergonic reactions? A) The products have more total energy than the reactants. *B) The reaction proceeds with a net reiease of free energy. (3) Some reactants wiil be converted to products. D) A set input of energy from the surroundings is required for the reactions to proceed. ii) The reactions are nonsporitaneoos. 22) Which of the foliowiitg shows the correct changes in thermodynamic properties for a chemical. reaction in which amino acids are linked to form a protein? A) +AH, +418. «MG B) +AH, «AS, ~AG *C) +AH, 1'18, +AG D) arr, «MG E) ~AH, +48, «MG 23) The hydrolysis of ATP to ADP and inorganic phosphate (ATP + H20 we» ADP + Pi ) A) has a AG of about —7 kcalfmoi under standard conditions. 8) invoives hydroiysis of a terminai phosphate bond of ATE). C) can occur spontaneously under appropriate conditions. D) Only A and B are correct. *E} A, B, and C are correct. 24) Which of the following is not true of enzymes? A) finzyme cata-iysis is dependent on the pH and temperature oftiie reaction environment. B) Enzyme catalysis is dependent on. the threcwdimensional structure or conformation of the enzyme. *6) Enzymes provide activation energy for tire reaction they cataiyze. D) Erizynes are composed primarily of protein, but they may bind nonprotein cofectors. E) Enzyme activity can be inhibited ifthe enzyme’s aliosteric site is bound with a noncompetitive inhibitor. 25) The active site of an enzyme is the region that A) binds aiiosteric regulators ofthe enzyme. *8) is invoived in the catalytic reaction ofthe enzyme. C) binds the products of the catalytic reaction. i3) is inhibited by the presence of a coenzyme or a cofaetor. 5) both A and B 26) increasing the substrate concentration in an enzymatic reaction cocid overcome which of the foliowing? A) deoaturimtioo of the enzyme B) aiiosteric inhibition *C} competitive inhibition 1)} saturation of the enzyme activity E) insufficient cofactors Chapter 9 28) Where does glycolysis takes place? A) mitochondrial matrix B) mitochondriai outer membrane C) mitochondria": inner membrane D) mitochondrial intermembrane space *E) cytosoi 29} The AT? made during glycolysis is generated by *A) substrate-level phosphorylation. B) electron transport, C) photophosphorylation. D) chemiosmosis. E) oxidation of NADH to NAEY. 30) The oxygen consumed during ceilular respiration is A) giycoiysis 2’?) Which of the foiiowing statements is (are) correct about an oxidation—reduction (or redox) reaction? A) The molecule that is reduced gains electrons. B) The molecule that is oxidizecf loses electrons. C) The molecule that is reduced. loses electrons. D) The molecule that is oxidized gains electron-s. *E) Beth A anti B are correct. involved directly in which process or event? *B) accepting electrons at the end of the electron transport chain C) the citric acid cycle D) the oxidation of pyruvate to acetyl CoA E) the phosphorylation of ADP to form ATP 31) Which process in enkaryotic cells will proceed normain whether oxygen (02) is present or absent? A} electron transport *8) glycolysis C) the citric acid cycle D) oxidative phosphoryiation E) chemiosmosis 32) Carbon dioxide (C02) is released during which of the following stages of cellular respiration? A) glycolysis and the oxidation of pyruvatc to acetyl CoA *8) oxidation of pyruvate to acetyl CoA and the citric acid cycle C) the citric acid cycle and oxidative phosphorylation D) oxiciativc phosphorylation and fermentation E) fermentation and glycolysis 33) For each molecule of glucose that is metabolized by number ofNADH + FADH; molecules produced? A) 4 B} 5 C} 6 D) 10 *E') {2 34} Celiular respiration harvests titre most chemical ones A) substratefevei phosphorylstion *B) chemiosmotic (oxidative) phosphorylation C) converting oxygen {0 ATP D) transferring electrons from organic moiecuics to pyru glycolysis and the citric acid cycle, what is the total gy from which of the following? rate 4 E) generating carbon dioxide- and oxygen in the electron transport chain 35') The primary role of oxygen in ceiiniar respiration is to A) yieid energy in the form of ATP as it is passed down the respiratory chain. *3) act as an acceptor for eiectrons and hydrogen, forming water. C) combine with carbon, forming C02. D) combine with lactate, forming pyruvate. E.) catalyze the reactions of giycclysis. 36) In chemiosmotic (oxi-dative) chosphorylation, what is the most direct source of energy that is used to convert ADP + P; to ATP? A) energy reieased as eicctrons flow through the electron transport system 8) energy released from substrate—level phosphoryiation C) energy reieasecl from AT? synthase pumping hydrogen ions against their concentration gradient *9) energy reieased from. movement of protons throng}; AT? synthase E) No external source of energy is required because the reaction is exergonic. 3’?) How many molecules of carbon dioxide (C02) wouid be released from the complete aerobic respiration of a molecule of sucrose (C QHQQ 0; 1), a disacch-aride? A) 2 B) 3 C) 6 *D) 12 E) 38 38) Which metabolic pathway is common to both ceiiuiar respiration and fermentation? A) the oxidation ot‘pyruvate to acetyi (30.4 B) the citric acid cycie C) oxidative phosphoryiation *D) giycolysi-s B) ch-emiosmosis 39) An organism is discovered that consumes a considerable amount of sugar, yet does not gain much. weight when denied air. Curiously, the consumption of sugar increases as air is removed From the organism‘s environment, but the organism seems to thrive even in the absence of air. When returned to normal air. the organism does fine. Which of the foiiowing best describes the organism? A) It must use a motecule other than oxygen to accept eiectrons from the electron transport chain. 8) It is a normai eukaryotic organism. C) The organism obviously lacks the citric acid cycie and electron transport chain. D) it is an anaerobic organism. *5.) it is a facultative anaerobe. Chapter 10 40) Which of the foilowing are products offiie light reactions of photosynthesis that are utilized in the Calvin cvcie? A) CO2 and gincose B} H20 and 02 {I} ADP, Pig and NADP" D) eiectroos and H+ *E) A?!) and NADPH 41) A plant has a unique photosynthetic pigment. The Eeaves of this piant appear to be reddish yellow. What waveiengths of visible fight are not being absorbed by this pigment? *A} red and yeiiow B) biue and vioiet C) green anti yeiiow B) bilge, green, and red E) green. bi‘ue, and violet 42) Which of the following sequences correctly represents the flow of electrons during photosynthesis? A) NADE’H w» 02 ~+ C02 *8 H30 ——* NADPH *4 Calvin cycle C) NADPI—l ms chlorophyll —~> Calvin cycle D) H20 M» photosystem i —+ photosystem ll E) NADI’H Mr electron transport chain we ()2 43) As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in l hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from? A) photosystetn ll B) photosystem I *C) cyclic electron flew D) noncyclic electron flow E) chlorophyll 44) in a plant cell, where are the ATP synthase complexes located? (Pay attention?) A) thylakoid membrane B) plasma membrane C) inner mitochondriai membrane *D) A and C E) A, B, and C 45) Which of the following statements best describes the relationship between photosynthesis and respiration? A) Respiration is the reversal of the biochemical pathways of photosynthesis. *B) Photosynthesis stores energy in complex organic molecules, while respiration. releases it. C) Photosynthesis occurs only in plants and respiration occurs only in animals. D) ATP molecules are produced in photosynthesis and used up in respiration. E) Respiration is anabolic and photosynthesis is catabolic. 46) What is the primary function of the Calvin cycle? A) use ATP to release carbon dioxide B) use NADPH to release carbon dioxide C) split water and release oxygen D) transport RuBi:r out ofthe chloroplast *E) synthesize simple sugars from carbon dioxide 47) All of the following statements are correct regarding the Calvin cycle except: A) The energy source utilized is the ATP and NADPH obtained through the light reaction. *B) These reactions begin. soon alter sundowa and end before sunrise. C) The Swearhon sugar RuBP is constantly being regenerated. D) One ofthe end products is glyceraldehyde phosphate. E) Robisco attaches carbon dioxide to ribulose bisphosphate. 48) In C4 photosynthesis, carbon fixation takes place in the cells, and then is tiansferred as malic or aspartic acid to 47W____N cells, Where carbon dioxide is releasedilgomrme-ntry into the Calvin cycle. *A) mesopiiyll; bundle-sheath B) stomatai; niesophyil C) bundle-sheath; epidermal E3) epidermal; mesophyll E) stomatal; epidermal 49) Plants that fix (30; into organic acids at night when the stomata are open and carry out the Calvin cycle during the day when the stomata are closed are called A) Q plants. B) C4 plants. *C) CAM plants. is) B and. {I only, a) A, B, and C ...
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This note was uploaded on 11/29/2011 for the course BIOL 1001 taught by Professor Minor during the Fall '08 term at LSU.

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BIOL 1201 Exam 2 - Biology 1201-6 Exam 2 16 October 2007 Read each question carefuin before answering Make sure that your name(LAST NAME FIRST and

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