Midterm Exam with Answer Key Fall 2009

Midterm Exam with Answer Key Fall 2009 - C n14 SW...

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Unformatted text preview: C: n14: SW» ‘Pmcfidlut BME 221, Midterm Exam, Fall 2009 MM Name UM ID# Q1) Higher organisms, including humans, oxidize glucose to C02 and H20. The energy Ii: 231.,g K that is released from this reaction is used in a series of coupled biochemical reactions to synthesize biomolecules and ATP and to do work. Although our body is overall performing the combustion reaction of glucose, it does not carry out this reaction in a combustion (heat) engine. Explain why a heat engine would not be an efficient design for water-based forms of life such as humans and all other life that we know of. (SP) “Nab 40am? (Inn-r «If $ve I W azuMoV: (”Ra reJmc) {a Wre 2.le :~2°C aul +Im°C 23' k 21% K _ ‘ K T —T 21-3 K-ZZHK \o-o K ~ t cl '- z___ ‘ 5 = _ : . M if“ 7 ‘2. 213 K 2%. K 79” 0....st R My Pegs-M dkdé-7 bung-J 5; YEW. whet Ts 9‘? Q0140 G» . U wow-Q0 lac we (‘0 aokc—uc( (mm M {Jul-of W7 Ru. wt», wean.) 6° (32 fee hot rum/w at (00°C W! cm) «a. 04a» (64 0:6) of 6°C (Dr-1°C) — Die.” (3059M MW” " LL87 av Ovv-"Sh—nt M~k¥~ We fiL‘oM-LOSMISIWékJ'QMmLM M) W {a qfi‘a‘ afo. a“; 9.7.2; a «a Ira/aw Q2) Explain why it takes longer to hard-boil an egg in the mountains of Nepal compared to a location at sea level. (5P) an, ‘2”. PU‘GJ‘H'C 09‘ WWOL. (1'; VG?! (mute mow.“ CLM Mc (ampere. $6M... abut-9W9 manure ; QM a! («18 «Slh‘qwh/ Wit) we; a} W (“~13 a...) R»: ‘.f aims «Am-e a“ a biotlamfawtgs“) w a”... Mo. Page 1 of 6 Q3) Functional protein complexes can consist of two or more proteins. Imagine you study one such protein complex that consists of protein A and B in an aqueous solution. Imagine that you find experimentally that the A-B complex is stable at room temperature but dissociates if you store the solution in the refrigerator. A) What would this result tell ou about the type of interaction between A and B? (5P) B) Explain? (10P) A) 4% WM. “Win M 2M, )I'MV‘VCH/Yefl.“ X [hcm‘j (at W WOW W (4:; :k‘O’QC/faq 3) AAA-Lb {euu'wfl MHom_ “at fed rwlfJuC/fou gs giro at/ (LC/awed J “Wall - M 0:» 7::10'0 t‘ " . W . Shae an My ”Mao‘s A B area/>42; ofin‘cy 49W Mothm/ (at “how K61 W/ M1117 6‘.» M+ Le . 140.14 afar. W (QM fifwd’fifia arm/405a W m (Llama Mr be Q4) A) Why can water be sterilized by boiling it? (2P) B) What happens on a molecular level in order to achieve sterilization? (4P) C) Why? (4P) L: It”: (00°C wast-“mew wield “a hall/5 Q5) Modern windows with good thermal insulation often have at least two panes of glass and the space between the two panes is filled with Krypton (Kr) gas. What could be a reason that relates to the physical properties of these gases why window makers chose Kr and not Helium (He) gas or regular air (which consists mostly of N2)?(10P) '- -3 , _. \ _ EU” ‘ i LBT E442...” 35 MV2 ‘5) '32- LET = :1va la w!“ {W (mi "0 lac, WW mugs“; Rte-02ft Ru. ultimo, (Cu. 50/; md» WMKQOW‘JZ hm‘PMWVémo/eszlufld‘v hNoW.A+mWWrC/ ”WW cw“ Zen/JG W M“ W“ WE; are ”Eu-0' 6—1.5":5’5/ occur ()2; {£44, :u-J‘Oud (0.9. u. +34. E; f—M-V “an «41 ISRAI—MBHDO—JW).T COED-isbh}?! NJ) HM 1..kaqu Mus M Lon} 75 09M W M Q6) Recent studies indicate that people above age 40 appear to have a reduced risk of developing severe cases of swine flu compared to young people. Tests on blood samples from these two age groups showed that many of the older patients possessed partial immunity from antibodies in the serum of their blood, which seem to be related to an Ir influenza outbreak and vaccination in the Seventies. Imagine you were working in a lab and had access to a solution that contains the 2009 strain of the H1N1 virus at high concentration. Imagine also you would find two serum samples that did contain antibodies that recognize the 2009 strain of H1N1 viruses, one of these samples would be from a 48 year old and one from a 100 year old person who was infected with the Spanish Flu in 1918. Imagine that you were able to purify and concentrate the antibodies from both serum samples such that you obtained a concentrated solution with the exact same concentration of antibodies that recognize the 2009 HlN 1 strain from each of these two samples. How could you investigate if the antibodies of the 48 year old or the antibodies from the 100 year old person bind stronger to the 2009 strain of HlN 1 virus particles? (15P) )SCis Bum a CM WM (eilenr wa'pmum 21”.” ‘—‘"——D])S(. ad Saw-ac 6°‘-d:\¢abs Jot 0‘ a1- ) on M Gav-fa. v.34» h 19‘ ‘ ‘ . loot) chic _. \k & Cpc/ Wop led. [moi W win» apkhocb.“ ac 059% ‘ kph“) ‘0 firUQS . Cab-19“ ('60. RSV-1“ “I Auk—d; \am} new»; Nvmkxésm. 9 V223,, The. M WEAK «at Qnugu W) wade k. *6“- 4(‘9‘3‘5 ‘dr~'&z3 minced? (chow-:1 Mk I ‘ (ac ‘Ma MERI- Hmmkqm w9wfi¢uo~fldwk ‘-~ ‘ :4 ,3 If E / :d’ (<54, cm at was,~ one: -> No &- W—ev-vk ”f 9r“ 6 . .- 336 com (a (99ch M +0 \'e' W gage32)f6 L:_.— a \ 0.7% wt?» " h M 9:»..— wR'O-DW‘ MS (a. All was!» in chew,» M3 «’4 rmwntwcwwhw Q7) A) What could be the cause on a molecular scale, why a mixture of two solutions may not behave like an ideal solution? (2P) B) For a solution with negative deviation from Raoult’s Law, would you expect that the chemical potential of the solvent is more or less negative than if the same mixture would behave like an ideal solution? (2P) C) Explain.(3P) D) What consequences would this result have with regard to the reactivity of the solvent from this example in the case of the non-ideal solution compared to the case of the ideal solution?(5P) A) if CWOW+ A Kai-flak 416339— Wak CuToua-a" E M wt‘rkA ~49 EW‘RA "31% cox—ace“ f~ TM $064522- ¢fl 9w... (Lobach'ou 5114166“ «.4? ch) ,3 w‘aéuéé/ I / ‘ 33...“. if». v —b \Aow- (ohm—Q wok . mm“ c” a _ 35 us. at ‘ "- ‘_ I (“a 2‘0“”: L?“ «us M| s l. 0 .. . 7: 3: 0.0 '>£'<XA’PA*XB 1’3 (PW 3 ms W led" ( Q8) A) Explain two different processes that you could use in a third world country for cooling without access to electricity (imagine you had all the necessary items/setup available).(2P) B) Explain how each process achieves cooling.(3P) l.) 734% [M‘w‘awév IVA-“.9" 0/ 0' whim-«Jaw ’ 59K Ova/Cf (N “Law We Jaw W g0? Mt'a/éawaé Elf/A 0—5179» 9-09, wk 0-» V(QM. "ff/{.— lgzm ‘Eu. 0? m (ea; ng—fvfizf— ‘ 939.190»- ‘975‘”' PM it» (wade) “(CM-P “Ml“ M l— 32“ ‘606 ,, (”it la. “as.“ may / M a» WWW». of u-OJ'U 9“,?“ RM &D\\=€ FW'F): ”WW 9°” 4“ W33" “Lax “S Tillman 0. can)?” 4 “a $1 Z” g4“; a. Jagiii’? p meg. {:1 we 5W1) Q9) How much faster are the N2 molecules in the air moving in Death Valley during the hottest summer day (57 C) recorded compared to N2 molecules in the air at the North Pole during the coldest days in winter (—43 C) (assume the gases to behave like ideal gases, the pressure to be 1 bar in both cases, and neglect possible influences of wind)?(5P) 2 ._ l; _ , L —2. __ —’ _“ ¢——— T '—" hon» ‘ \AV MUZZOK Ct“ /L“ T ’Z/\ N __ 3 14.. ~ —e.Ou.‘023_L ’ 's“ k& Inna-L 1.4.," sz' “is H {W T» . (We zmg .753§~=c, [M12 ‘Q 130% ° N ”z {u M VJ¢97 NZ wove; NZOV. Q10) A) Why is it useful for engineers to know the First Law of Thermodynamics? (5P) B) Why is it useful for engineers to know the Second Law of Thermodynamics? (5P) C) From the point of View energy conversion into work, why is it better to carry out the oxidation of methanol in a fuel cell compared to a combustion engine? (3P) 5‘ A.) [Ms smwwmwmaw ‘(Pb mete/~03. This L6,») 1‘: unefvl b W?) M moth. wvde/ QA~UU7 Mpwm *0 6‘43“ W I‘LL—0') ts “('— R «>6 ”new“ OW“ i” pa%fiwvi&w 4'61 W LA“ ...
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