BIO326R_Exam1_KEY - . ,xr Printed Name KL / UTElD BIO s326R...

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Unformatted text preview: . ,xr Printed Name KL / UTElD BIO s326R SUMMER 2010 DR WALKER EXAM 1 INSTRUCTIONS: FTI’LL lN NAME ANf) 6N HE SCANTRON, NOW. FILL IN YOUR NAME ON THE TOP OF THIS PAGE, NOW. READ THE INSTRUCTIONS BELOW, Now. Answers. Answer the multiple choice questions on the answer sheet. Write answers to the other questions on the test. Tun—I in both answer sheet aha test. Militip'le' Choice are 2 me each; others as indicated. Read the questions carefully. For the multiple choice questions, choose only the best answer. Written answers which are correct in content but not relevant to the question cannot be scored correct. Understanding the questions is part of the exam. Therefore, no questions about the exam will be answered, unless some of the exam questions are ambiguous, in which case, the entire class will be interrupted and the same explanation made to everyone. If you think that a question is ambiguous, inform the TA or instructor. §e¥erat Questigns est; yes 39 eeatyze testers restarts! ans fQHEL—‘létg as ease-let rather than lust to repeat material from memory. WAIT TO OPEN THE EXAM UNTIL THE BELL RINGS a. two or more hydroxyl groups can dissociate into a proton and an anion b. Mo‘carbonyl groups .d. all meaboye 2. C bonyl functional groups contain a carbon double-bonded to oxygen must be the first carbon (of a chain of carbons) 1. Molecules of pyruvic acid contain Q c. react with acids to form hemiacetals 9;. all the sleeve 3. Esters and anhydrides are related in the sense that a. both are high energy compounds acids are required to form both b. both attract protons and become positively d. all the above charged 4. Amino acids a. always contain an asymmetric carbon @ are found in flagella subunits b. are polymerized to form anhydride chains all the above 5. Bacterial structures which are involved in attachment to other surfaces are a. called hooks composed of protein b. composed of low molecular weight compounds ’ linked together by N-glycosidic bonds d. all the above 6. erial chromosomes -a. are double stranded DNA c. commonly have introns ' generally are present in two copies per cell, meaning that bacteria typically are diploid d. all the above 7. Bacterial cytoplasm would be expected to contain ‘ low molecular weight compounds which 0. enzymes which catalyze crosslinking of ' can be polymerized to form enzymes peptidoglycan b. peptidoglycan polymerizing enzymes d. all the above 8. oils reactions _ a. depend on catabolic reactions to provide low molecular weight precursors of macromolecules energize the cytoplasmic membrane c. synthesize a pool of reducing power which can be used to support the electron transport chain d. all the above I ' 9 Exergonic reactions - . require the net input of free energy c. do not occur spontaneously produce a product or products with lower energy level than the reactants d. all the above 10. An enzyme catalyzes a reaction by changing the a. reaction from endergonic to exergonic free energy of the product(s) b. . equilibrium @ activation energy required 11. Compounds (or bonds) which release a lot of energy when broken include esters c. peptide bonds ' a. @ anhydrides d. O — glycosidic bonds 12. A typical bacterial fermentation oxidizes a. acetaldehyde NADH + H+ i3. ethanol . Exit the. abGVé 13.. -- bacterial electron transport chain ' is involved in generating proton motive force ‘ is located in the mitochondrial membrane 14. 15. 16. 17. 18. 19. 0. always requires oxygen as the terminal electron accepter d. form's reduo“ nicotin‘amide' adenine dinucleotide Proton motive force makes possible ATP synthesis from ADP and inorganic phosphate results from an energized membrane is generated by reactions of the electron transport chain all the abotle ATP synthase 8 is an enzyme which catalyzes substrate level phosphorylation is an enzyme which uses energy of an energized membrane c. catalyzes formation of an ester :11: makes it passable fer bacteria to grew in the -seence at a terminal 9.99390 esseetgr P pili present on the uropathogenic strain of Escherichia coli a. are localized in the outer membrane b. serve as attachment organelles c are assembled from protein molecules which have been transported across the cytoplasmic membrane all the above Binary fission a. depends on both anabolic and catabolic pathways b. can occur in cells growing aerobically and anaerobically c. produces two bacterial cells which are identical to the cell which formed them all the above ' . During the exponential phase of bacterial growth, the number of cells at any given time can be calculated if you ow the number of generations which have been formed, plus the initial number of cells when the exponential phase began ‘0 the duration of the lag phase the maximum number of cells which can form in that medium c. d. the composition of the medium An organism which would survive desiccation is Clostridium botulinum because it a. has a thick layer of peptidoglycan which provides protection against harsh environments b. forms endospores which are durable and resistant . ' forms a protein capsule which provides protection against drying d. forms a thick, waxy cell wall which holds moisture inside the cells equally effective against cells and spores were the first cure for tuberculosis = ' e solutions in alcohol a are effective antiseptics c. remove wrinkles from skin d. 21. (1 0 pts) Name the bacterium (genus and species) which causes each disease. List the shape of the bacterial cells. Disease Organism ’ Cell shape Diphtheria 60*“! W2 [926.1% Wan 4‘ Eiflfié’r lab: 501C171“; @IFD/tlafi PM M) Tetanus W B/lmw)’ Meningitis fl/flisswi‘a mam DOM/s 9" Larry; (DiPLOC‘cN'flI9 Lyme Disease gfirrf M: bu rgdorfiam‘ SPIRAL Car/pommj Anthrax 8950/“ .2 "l M (“if , BAP/Ll 1.15 91* _ ,, W... AW 0mm 0052“ t i 22. (10 pts) A. Draw the structure of any pentose (a five carbon sugar); name the pentose; circle and identify two functional groups (or the atoms which define two classes of compound) (one functional group and one class of compound is OK). H EM] ACFTfiL Ha H .. \ _ z -7). R) g 0 Si: F O a“ fiQi/bosc (S 014 i p ;,.. ii i 6’ .7 (e a 0 C A i v e H YDflflva B. Draw the structure of the amino acid, tryptophan; circle and name two functional groups. It is not necessary to diagram the D or L form. 23. (10 pts) For these microbial cell structures, name and describe briefly one function of the structure. Your description should be detailed enough to indicate how the function is performed and what kinds of macromolecules perform it (for example, protein, nucteic acid). Flagella "77x10 P11076710 (was M} C‘l’mFLASMlé MEAgMA/F 5PM} WE FMGFALUM FILAMEUT yFL/lgzsLL/U Maximum: AS’fiBM/SZED no??? F’LAMENT tun/(xi HAC Aim) tea/T «#706 A7 771: Wok me 72:42 729 Maw/DE Mar/2177 C o lasmicMembrane “'52: ~ .1: lEA—ALE 64.316572» HOSP/fOLifND MDZEKULES wraemL (72’ 777; MEM 64mm: fls‘fE/méL/E all/777' FA’DW ACID; PHflSP/MFP§ flew/us 77w MFl’lfiA’AUE mamas; 7? pgauau'r 4:417le ax: masr 77f/NG—f amen THA/V WINE-"K A??? Endosgores MUS/5 7’ CF 771? CH ROMU SUML—T iUMoc/UDE?) ,6‘/ F “IL/14E? a (a $055,445 W CVWPMMM MEMKMME’ PEPT/boswc/u) Mych Ffflme can" flay/“aw; 7U Kama 5mm: mm'r aur— vmgcg v- flea: 72> Sum/ME #A/KH QUE/770w 24. (10 pts) A. i. Name two major products (biochemicals) each of the following provides for the cell and list its subsequent use? Abbreviations are not (NOT) acceptable for full credit. PRODUCT USE n ‘ Giycolysis A DEX/Q gm] E ’M/ PIN/“S pi! 4 TE 1* Maze} fig?) (/35?) (VA D ti + H“) + A/iCflWU/QMI'DE ADE/UM) F WUfi-‘EK 5" as H r0 iAJUC’LEflWDE 3 £155me WUS’PB/M" (WA a] + Respiration /‘/4 D H + H K E'DUC‘E Q. GU14 magi/us Wzmwsmurr _________________________ l’% (ex/may 50URC€ B. List one advantage fermentation of pyruvate to lactate provides for bacteria? PER/44:73 can 77) 61/va IN' Ms‘c’MC'E 0F {2Xng Rena/ac“; NAB/1441+ TD umf 25. (10 pts) What is a distinguishing characteristic of anaerobic respiration? You may answer this question just by defining anaerobic respiration A Mimomc ,QL—"s‘puz/p— 10A) Rem/n25; “TERM/MA L EZEI‘WN AFEEPTDK am "1 771m 0; What is a distinguishing characteristic of (or define) chemolithotrophic respiration/nutrition? UHE‘MOLITI/O'TROFHS mew w/Tflouf‘ ANY aka/mm MMpQUA/D: /‘N 7716 ENVIRONMEUT— 77ny W4) 4w Alarm/iqu mama/’11 may What is a distinguishing characteristic of (or define) anoxygenic, bacterial photosynthetic respiration/nutrition? SUNLiciJT EX? 173' 4AC7P‘RIOCHLDIQDfl/IYLL LUI'iiC/I W us Fm: 'ELEc‘mopr 7v EI’TIC. LuHrm flA§€i§S THE/I /b/‘lL‘”K TTJ UHLORCMHVLL Briefly describe non-symbiotic nitrogen fixation (that is, nitrogen fixation which does not involve legumes). Include the organism genus and species. AZO‘fobac‘TQr wipe fanéx'd‘ gym/gyms fl; 7-0 Nili [Nb‘¢+) w" VHFU —————________________3______ M27?) dflMA/ic (‘gMng/U‘b)’- rr LIVES wifligar Nil-1P flf’x ———————______—_____________________}_____ 67¢ZQA’N’C xv/mocc—w {OURC’E 26. (10 pts) Define the basis for selective toxicity of each compound below. A complete answer requires the mechanism of toxicity in the infectious agent and an explanation of why the compound is not toxic for the host. A. Sulfonamides’ I’NHIA/T F0116 Ad”) 94270525 (6? [mm/G A; SnZUCTU/ML Ail/twa 29F PARA nu [5.40'75721/4. M757"; musr INCJEST mu: Ari/7) w F003 B. Streptomycin H‘JH "‘5 "75 [9/30 7177M SVNW/EY’I 14y PR€I<A~£VOTI< R lfl>050 MES (70 5') mm- 'fVAUSOMc‘y M’s LAMFR v- M'p/a: gawpwx i— ARE we?“ /M/H,4/n=b f5)" ngPWMYC/Aj ...
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This note was uploaded on 09/15/2010 for the course BIO 89835 taught by Professor Walker during the Summer '10 term at University of Texas at Austin.

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BIO326R_Exam1_KEY - . ,xr Printed Name KL / UTElD BIO s326R...

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