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Fall94+Exam2_Moroney

Fall94+Exam2_Moroney - EXAM 2 BIOLOGY 1201 Fall 1994...

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Unformatted text preview: EXAM 2 BIOLOGY 1201 Fall 1994 Section 1 . Name: Social Security Number: Choose the best answer for the following questions by filling in the appropriate space on your answer sheet. There are 50 questions. 1. Many unfavorable reactions in the cells are directly coupled to the hydrolysis of which high energy molecule? a). glucose b). pyruvate c). NADH d) . ATP e). gasoline 2. Which pathway is used both in aerobic .respiration and lactic acid fermentation? a). Krebs cycle b). electron transport chain c). glycolysis d). production of lactic acid from pyruvic acid e). synthesis of acetyl CoA from pyruvic acid 3. The stage of photosynthesis that actually makes sugar is . a}. The Calvin cycle b). Photosystem I c). Photosystem II d). the light-dependent reactions e). The ATP synthase 4. In photosynthesis, what is the source of-oz? a). 02 is produced directly from from CO2 b). 02 is produced directly from NADPH c). 02 is produced directly from Hg) d). 02 is produced directly from ATP e). 02 is produced directtly from chlorophyll 5. In aerobic respiration, during which process is 02 actually consumed? a). glycolysis b). Krebs Cycle c). Calvin Cycle d). Tricycle e). mitochondrial electron transport 6. How many ATP's are produced when glucose is converted into two lactic acids during lactic acid fermentation? , a). 2 b). 6 c). 12 d). 13 e). 36 7. How many CO2 molecules are produced from one acetyl CoA when it goes through the Krebs cycle? a). 1 b). 2 c). 3 ‘is-Dz1! d). 6 ._ _ .— .1 2 MATCHING: For questions 8 - 13 mark the letter of the metabolic pathway listed in the column below that best answers the question. AN ANSWER MAY BE USED MORE THAN ONCE. a). mitochondrial electron transport b). lactic acid fermentation c). Calvin Cycle d). Krebs cycle e). glycolysis. 8. The end product of this process is pyruvate 9. This process consumes NADH and oz 10. This process contains the enzyme ribulosebisphosphate carboxylase oxygenase (also known as rubisco) 11. This process occurs in anaerobic muscle cells but not aerobic muscle cells 12. This process consumes NADPH and ATP 13. This process takes place in the mitochondrial matrix 14. Igzyou ate some sugar that had radioactive 1('C--glucose instead of the usual C-glucose what would happen? (please note that LSU does not condone this activity) a). You would instantly die of radiation poisoning b). The glucose would be burned to CO2 and you would breathe out radioactive CO2 c).-The radioactive glucose would pass through your body because you cannot use that form of carbon d). You would be transformed into the "Amazing Hulk" 15. During photosynthesis, a three carbon sugar phosphate is produced and this sugar exits the chloroplast. How many CO2 molecules are needed to make this sugar phosphate? a). 1 b). 3 c). 6 d). 12 e). 24 16. Which type of organism below produces 05? a). A dog (genus gangs) b). A honey mushroom (genus Armillarig) c). A tomato plant (genus Lygospgrum) d). All living things produce 0. e). 02 is not made by living things. 17. Which answer best describes the sequence of reactions that take place when glucose is completely oxidized during aerobic respiration? a). electron transport, glycolysis, Krebs cycle b). glycolysis, Krebs cycle, electron transport c). lactic acid production, glycolysis, electron transport d). glycolysis, lactic acid production, Krebs cycle 4 « e). Krebs cycle, electron transport, glycolysis ' 3 Questions 18‘21 refer to four flasks of yeast. The flasks contain all of the nutrients yeast requires for growth except they differ in energy source. The four flasks are described below. Flask A contains glucose and o2 and is kept in the dark. Flask B contains glucose but no 02 and is kept in the dark. Flask C contains 02 but no glucose and is kept in the dark. Flask D contains no 02 and no glucose and is kept in the dark. Flask E contains no 02 and no glucose but has C02 and is kept in the light. 18. In which flasks are the cells making enough ATP to grow? a). all of them b). only A c). A and B d). A, B and E e). A, B, C and E 19. Which flask(s) is/are producing C05? a). only A b). only 3 c). A and B d). B and D e). A, B, c and D 20. Which f1ask(s) is/are producing ethanol? a). only A b). only B c). A and C d). B and D e). A, B, C and D 21. Which flask(s) is doing aerobic respiration? a). only A b). only B c). A and B d). A and C e). A, B, C and D 22. What biological system did Hershey and Chase use in their experiments to show that DNA is the genetic material? a). A fungus that lives on dead wood b). A virus that lives on a bacteria. c). A bacteria that kills mice. d). A bacteria that lives symbiotically with soybeans. e). Human Immunodeficiency Virus 23. A reaction that releases energy as it proceeds is . a). an isotonic reaction b). a hypotonic reaction c). a hypertonic reaction d). an endergonic reaction e). an exergonic reaction 4 24. DNA is extracted from the S strain of Di91999999§ 9999m99199,which is capable of making a cell capsule and infecting mice, is mixed with living cells of the R strain which cannot make the cell capsule and cannot infect mice. If this mixture is injected into mice, what will happen? a). The mice will die and the bacteria taken from the dead mice be able to make a cell capsule. b). The mice will die and the bacteria taken from the dead mice will not be able to make the cell capsule. c). The mice will live; but any surviving bacteria will be able to make the cell capsule. d). The mice will live; but any surviving bacteria will not be able to make the cell capsule. 25. In the next experiment DNA is extracted from the R strain of 21919999999 9999m9ni99, is mixed with living cells of the R strain and this mixture is injected into mice. What will happen? a). The mice will die and the bacteria taken from the dead mice be able to make a cell capsule. b). The mice will die and the bacteria taken from the dead mice will not be able to make the cell capsule. c). The mice will live; but any surviving bacteria will be able to make the cell capsule. d). The mice will live; and any surviving bacteria will still not be able to make the cell capsule; 26. The synthesis of RNA using DNA as a guide is known as . a). transposition b). translation c). replication d).'transcription e). superhelical gyration 27. What part of the virus is inserted into a host cell to start a viral infection? a). The viral protein b). the viral nucleic acids c). the viral lipids d). the viral carbohydrate e). the entire virus must be inserted 28. DNA replication is . a). conservative, the original double helix stays together . b). semi-conservative, the orginal strands separate but remain intact c). dispersive, the orignial strands separate and each strand separates into smaller fragments d). libertarian, the are no rules in DNA replication e). sectarian, The G-C rich regions of the DNA are separated from the A-T rich regions of the DNA during replication 29. Which statement about protein synthesis is true? a). DNA binds to ribosomes during protein synthesis. b). The mRNA double helix is unwound allowing translation to occur. . c). The enzyme reverse transcriptase is important in protein syntheSis. d). mRNA binds to the ribosome during protein syntheSis e). all of the above statements are true 30. Which a). A b). A c). A d). A e). T .5 m {1' I" O :1 m U‘ 0 I: r‘l' d’ D‘ (D b‘ m U) [D (0 P- :1 E p P. 01 R H I: (D u T + C G + C II ll++l| 00800 31. DNA isolated from a bacteria is composed of 30% thymidine (T). What percentage of the nucleotides are guanosine (G)? Think about this! a). 10% b). 20% c). 30% d). 40% e). 50% 32. One strand of DNA has the sequence 5' c-C-A-A-G-T-G—T— 3'. What is the sequence of the complementary strand? a). 5' C-T-C~T-G-G—A-A- 3' b). 5' A-A-G-G-T—C-T-C- 3' c). 5' A—c-A-c—T-T-G~G- 3' d). 5' G-G—T—T-C-A-C-A- 3' e). 5' G-G-U—U-c-A-c-A— 3' 33. A DNA strand with the sequence 5' A-A—G-G—C—C 3' will code for a mRNA with the sequence . a). 5' G-G—C-C-U-U 3' b). 5' T-T-C-C-G-G 3' c). 5' U-U-C-C-G-G 3' d). 5' G-G-C-C-T'T 3' e). 5' G-E-N-E-T-I-C-S 3' For questions 35—36 assume that I have given you a mRNA sequence that is 900 nucleotides from the start of the AUG to the beginning of the stop codon, UAA. Remember, you know the mRNA sequence. 35. Can you predict the exact amino acid sequence that the mRNA codes for? a). yes b1. no . c). it will depend on whether it is plant or animal mRNA as the genetic code is different in these organisms d). it will depend on whether it is eukaryote or a prokaryote mRNA as the genetic code is different in these types of organisms e). The protein made depends on the environmental conditions 36. How many amino acids will be in the final protein this mRNA codes for? a). 100 b). 300 c). 900 d). 1800 e). 2700 37. Which macromolecule listed below is required for DNA replication? a). DNA ligase b). rRNA c). rubisco d). ribosome e). tRNA 6 38. A messenger RNA begins with the sequence 5' AnU-G-U-U-C-C—C-U-C-U-A 3'. What will be the amino acid sequence of the beginning of this protein? Refer to the genetic code on this page. a). arginine - leucine - threonine — leucine b). methionine — leucine - threonine - alanine c). methionine - leucine - proline — leucine d). methionine - alanine - proline - alanine e). methionine - phenylalanine - proline - leucine MATCHING - Questions 39-42 concern a "normal“ mRNA message with the sequence 5' A-U~G-G-G—C-G-A-A—U-A-G 3'. Each question lists the sequence of a "mutant“ mRNAm The column below gives four possible results of that mutation.‘ List the letter of the answer that best describes the protein made by the altered mRNA. Refer to the genetic code on this page. a). The new protein will be exactly the same as the “normal" protein b). The new protein will be shorter than the "normal“ protein c). The new protein will be the same length but have a different amino acid sequence d). The new protein will be longer than the "normal" protein e). the protein will not be made " ""‘L‘A'SECONDBASE - because it has no start signal i; :rrt‘ UCU; UAU UGU1 iU“ »_r : Phe ; 1T)" CYS i * v” VUUC- UCC‘ UAC- UGC- !c 39. 5' A-U-G-G-G-C-U-A—A-U-A-G 3' .j-u :Ser ; -;;—_; EL’L‘A- Len UCA: cu Stop UGA StopiA — 40. 5' C—U‘G-G—G-C-G-A-A-U-A'G 3 ' _" ELI-Cr UCG3 L'AG Stop UGG Trp i6 41. 5‘ A—U-G-C-G-C-G-A-A—U-A-G 3' %; ECUU- CCU} CAUJHE CGU 1U~ .1-J. 'CL'C' CCCI CAC ccc c 42. 5' A-U-G-G-G-G-G—A-A-U-A-G 3' -4 c! ,7 {Leu __ pm Arg' 3 :5; lCL-‘AE cc». . 4 cm] cm CGA A -:-: '.‘ . , -. - .i . .L- in: y43i An mRNA sequence is: E CUGE .ccc‘ 3CAG ;_HCQG (3% 5' A‘U-G-C'C'C'U—U"U-U'A"G 3 ' 0 5’3 =1 '_ _= - —'-‘--'v..-;- 7- .‘—--"‘ an 2 Which sequence below would code for a E ALUV ACU .muJAm AGUSer LIE protein with the exact same sequence? 5% Acchk -ACC AAC] AGC] C E a). 5' A-U-G-C-C-A-U-U-U-U-A-G 3' 7.43.; A - i' - Th: - b). 5' A-U-G-C-CHC-C-U—U-U-A—G 3' '3 ADA ACAI AAAJME AGAJ A d) . 5' C-U-G-C—C-C-U-U-U-U-A-G 3' 3;. | e). 5' A-U—G-C-C—C-U-U-U—C-A—G 3' IGWE GCU1 CAI-’1“? GGU 'U . . . . r4; !Gt:c'- ccc! GAC ccc c -- 44. Which of the follow1ng is required :fc- vs {Ah aw i for protein synthesis? 2 lGUAi GCA. GAAIGM GGA IA: a). transfer RNA .L |GUG: GCG: GAG GGG i5; c). messenger RNA i ‘ .; '_ I d). all of the above 4_w_______"________________—_——— e). none of the above 45. Which statement(s) about chromosomes is/are true? a). A chromosome is a very large DNA molecule. . b). A chromosome will contain hundreds of indiVidual genes c). The genes on chromosomes control a large variety of different functions ' . d). Each gene on a chromosome will code for one protein e). all of the above statements are true 7 Questions 46 - 48 refer to the marathon runners listed below. Four marathon runners are at the 20 mile mark. The physiological conditions of the leg muscles of these runners are described below. a). Runner A - his muscles have a good glucose supply and have oz. b). Runner B - his muscles have a good glucose supply but are anaerobic. c). Runner c - his musclesrhave no glucose but they do have 02. d)- Runner D - his,musclesxhaveanomglucosemandgthey are anaerobic. 46. Which runner(s) will have to stop? a). runners b and d b). runners c and d c). only runner b d). only runner c e). only runner d 47. Which runner would you say has the best chance of winning the race? 48. Of the runners that can continue to run, which runner will be using glucose at the fastest rate if they run at the same speed? 49. The enzyme that synthesizes RNA using DNA as the guide is . a). RNA polymerase' b). DNA ligase c). tRNA d). ribosome e). catalase 50. Which statement(s) about DNA is/are true? a). In DNA, A always hydrogen bonds with C b). The sugar part of DNA is ribose c). DNA is a double helix d). DNA is found in the cytoplasm in eukaryotic cells e). all or the above answers are true ...
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