Exam 1 Sept 2005

Exam 1 Sept 2005 - Exam r ' ' - ' - 1 A B108 350 EWATION I...

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Unformatted text preview: Exam r ' ' - ' - 1 A B108 350 EWATION I . -‘ NAME: 09 SEPTEMBER 2005\_ V l. The presence of _-rocks 3.85 billion years old indicates that liquid water existed at that time. a. [email protected] c. carbmiate d. igneous e. metamorphic ANS:_____ 2. Which of the following cell domains are prokaryotic? a. Bacteria h. Archaea c. Nuclear Line d. Eukarya @ choices a, b) and c I :__:" f - .- U _I _ _ _ . _ wit! ch offiie followmg was probably not a characteristic of the earliest hiring entity? m ‘“ )iL-“a. hyperthermophfle h. hyperhalophile c. oxidized reduCed sulfur cornpounds to obtain energy ived on the surface of pools and lalresi' ef'had the cellular level oforg‘anization ANSzw 4. The __ are the most-evolved cell domain. a. Bacteria 'b. Archaea (L31 Buk'arya d. Nuclear Line e. Archaeozoa .AN517 it? Rocks formed out of sterile mods have a 1E(LDC ratio atheratio of rocks forfeited from muds containing abundant life. I- it" . , ii :1; .r hi herthan . ow r . ,e at .- ANS: :2, ' d {"3 fiiséecaijfig. 12- ‘ ,r' a at}? 6. Most bacterial phyla are _. " I n a. Gram—positive ‘13.. ArchaeagéGram—negative d. Mchplasrna AN S :w 7. All of the cytOplasznic organelles of eukary-tes evolVed flora free-living _. 7’ a. Archaea b. Nuclear Line UrkaryoteBacteria e. Pachaeozoa ANS:— W: car We, x j” - r 14 assesses; a - - Jaime: 13:: _ Byéor a cell with-a diameter or 6 pm, surface areafce voidme =é urn"- ' I a M 5 . .“ a. 2.0 b. 20.0 c. 0.1 d. 0.2 (9‘) 1.0 ANS .-__ dig; : % my“ 535.? ¢j.§._gaet€«t‘~fl g: “ , "I This cell structure is describedlas a "repeating tetrasaccharide'_'. - I _ “got?” a. lipid A in. outer core polysaccharide (QJOLpolysac-charidgd. irirrercore‘p‘olysaccharide '3 ‘. e. teichoic acid oofia‘mmy ‘ ' _. I” n H ’\ ' lens? A, [.LPS are t, OWE-113.315 ELM» .LPE . . . - (3-! 10. On early Earth, as mere ecological niches appeared, biodiversity _. gr increased h. decreased c. stayed the same ANS:_ _ 1'1. _ is the phenomenon in which the metabolic waste products of one type of bacterium Serve as nutrients for another type of bacterium. [a syntmphy b. mixotrophy c. chemotropliy d; organotmphy e. autotrophy ANS:_‘ 12. Haploid genomes and rapid rates of multiplication allow bacteria to __ _ a. be metabolically diverse b. be adaptable c. occupy extreme environments d. occupy microenyironments @evolve rapidly ANS:__ Gram staining characteristic is determined by the A of the peptidoglycan. a; chemical composition thickness BJbOth a and b d. neither a nor 1) ANS:__ 14. Most of the O2 in the atmosphere is generated by _. A a nonbiological proceSSes (b. anoxygenic photouophy c. onygenic cheinotrOphy “Wm—— @ oxygenic phototropliy e. choices 13 and d ANS:~¥ . Examli I _- .. '_ I 2.." 15. Polymers of calcium dipicolinate are responsible for _ of the therrnosta‘oility of endos ores. a. all lb mostfiErnone ANS:_ Because of this characteristic, prokaryotes can occupy extreme environments. 8.. small size ‘0. rapid rates of evolution c. metabolic diversityfi‘gdaptability ._ structural simplicity ANS: ‘ .17, Many prokaryotes can grow in several different environments. This is due to the of prokarytoes. a. metabolic diversity (3 adaptability c: small size d. structural simplicity e. rapid rates of evolution. ANS:_ 1 8. Penicillin was put into general use in 1939. in 1942, the first penicillin—resistant strains of disease-causing bacteria were discovered. To what characteristic of bacteria can this be attributed? a. adaptability b. structural simplicity @rapid rates of evolution d. rapid rates of multi— plication e. haploid genome ANS:__ 19. The decolorizer used in the Endospore Stain is . [m Mil 3.. alcohol 13. acid—alcohol c. 12—1411 @ water 6. alkali ANS: n0 2Mycoplasma can only exist in _____ environments. fa. {isotonic @hypotonic c. hypertonic d. isobaric e. salty ANS:— 21. This group oflgactena is colored red at the end of the Grain Stain. a. Tenericntes Gracilictttes-ibdfirnficutw d. Mendosicutesf . hoices a and b ANSI; I ; 22. Which cell domain is the least evolved? a. Eukarya ‘0. Nuclear Line 0. Urkarotesflfi' Archaea e. Bacteria ANS :___ 23. There is no maj or family of organocornpounds that cannot be used as a source of carbon and energy by some group of Bacteria. This is an example of the _ of Bacteria. a. small size (5) metabolic diversity c. adaptibility d- structural simplicity e. rapid rate of evolution ANS:__ 24. We]: cell type is now extinct? a. Archaea 13. Bacteria?) Nuclear Line d. Eukarya e. Archaeozoa AN S :_ 25. The ozone layer filters out radiation. - El} ultraviolet b. infared c. ionizing d. violet e. visible ANS:_ 26.- Living bacteria are viewable by microscopy. 7 a (a: brightfield b. darld‘ieid c. dark phase~contrastflchoices a, b, and c'I-@&oices b and c MS:_ 7 1,: ’1 n " Censidcr dark phase—contrast microscopy. 2?. Before encountering the phase plate, Transmitted and diffracted light are out of phase by EM b. M3 @E'Rfli :1. M8 e. M16 ANS:__ 28. After passing through the plmsc plate, transmitted and diffracted light are out of phase by Z3316 be M8 W4 d. M3 M2 ANS:— 29. _ light pass 5 through the phase ring. a. difii'acted transmitted c. both a and b d. neither a nor in ANS:— 30. Bacteria appear as _. dark obj ects against a bright background lb: bright objects against a dark background c. dark objects against a darker background d. bright objects against a less bright back— ground 8. none of the choices ANS:— i In _" microscopy, only light diffracted by passage through a bacterium is focused up the , ' barrel of the microscope. a. brigbtfield @dark phase—contrast Edarkfield d. fluorescent e. choices c and d ANS :__ 32. The mordant in the Gram Stain is _. a. Il—KI @ 12 .c. Kl d. {CV-12] e. crystal violet ANS:W__ After the differential decolorization step has been performed a P am Stain, Gramupoaitive bacteria are _3 3__ and Graemenegative bacteria are _34_. 33. a. red b. green @bluc d. colorless eyellow ANS:__ 34. a. red b. green 5. blue @ colorless e. yellow ANS:___ 35. After the Acid—fast Stain has been performed, Acid-fast bacteria are W. @red b. blue .lc‘i colorless d. green eyellow ANS:__ 36. # is the counterstaiu of the Acid-fast Stain. a. Safranin b. Crystal violet c. Toluidine blue@ Methylene blue e. Garbo] fuchsin ANSzw 37. Perrneases are responsible for _ a selective permeability of the plasma membrane (b. rapid rate of solute transport across the plasma membraneflboth a and b d. neither a nor b ANS:___ 38. Which of the following is a component of a phospholipid? a. glycerol b. fatty acid c. phosphate d. ethanolarninc @ all of the choices ANS:— --r- Ho- at: — w; v NH; A“. Exam} I I 4 39. Ethanol solutions are hydrophobic. Consider a bacterium that oxidizes glucose for energy and exoretes large amounts of ethanol as a lay-product. As the ethanol concentration of the microcnvironment riSes, which of the following changes in the composition of the plasma membrane would take place? [The direction of the arrow indicates if the relatiVe abun- danCe goes up (T) or down (Jr). Abbreviations: sfa : saturated fatty acid, ufa = unsatura— t fatty acid, hop _= hopane] fifa (t), hop (Ly/Else (t), hop (t) c. sfa (t), ufa (T) (t), hop (t) e. sfa (t), hop (l) ANS:__ 40. 0 which of the following is the phospholipid matrix least permeable? H3Ur ‘b. glucose c. glycerol d. fatty acid H2O ANS:__ 41. Which of the following would not be a periplasmic protein? a. lipoprotein b. mercury-binding protein c. solute binding proteins d. protease @DNA polymerase ' AN S :_ ' 42. The number of different inner membrane proteins is _H_ the number of difierent outer membrane proteins. less than b. equal to @greater than ANS:— 4 Porins __ accelerate the rate of permeation of the outer membrane by small hydrophilic solutes. a. do (E) do not ANS:__ 44. Which of the following is a component of lipid A? a. N— acetylglucosamine phosphate b. heptose c. ethanolaminc @ glucosamine phOSphfit-S e. mycolic acid AN S :— 45. As distance from a substrate increases, nutrient concentration (gheCIeases b. stays the same c. increases AN S: 46. In the glycan tetrapeptide of L—lysine. a. Gram-positive bacilli b. all cocci c. Gram-negative cocci@ Grain—positiVe cocci e. Gram-negative bacilli ANS:_ , the amino acid at position #3 of the tetrapeptidc is Because of the ___ of their cell wall, Gram—positives can occupy habitats that are more hypotonic than those occupied by Gram-negatives. (a thickness b. chemical composition c. both a and b d. neither a nor b ANS:___ 48. Consider the glycan tetrapeptide of bacteria. The amino acid at position #4 of the tetra» peptide is _ L—alanine. a. always b. sometimes 0 nevor ANS: 4.9. _ Acid-fast bacteria are Gram-positive. a. Some {also :3. No ms:_ ‘ 50. Bacterial cells that have stored a lot of glycogen stain reddish—brown with _. a. safranin b. “mini din blue c. Sudan black B d. eosine@ iodine ANS:_ ENi’i EXAMINATIO \ ...
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This note was uploaded on 04/06/2008 for the course BIOS 230 taught by Professor Gibbons during the Spring '08 term at Ill. Chicago.

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Exam 1 Sept 2005 - Exam r ' ' - ' - 1 A B108 350 EWATION I...

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