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BISC 220 SI Review 2 03-05-10

BISC 220 SI Review 2 03-05-10 - r toN.t I:l 2 S pring 010...

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Spring 2010 [email protected] \ rtoN ". t * "-l''' I.:l " BISC 220 SI- Exam #2 Review 3ls lto Sarah, Sean and Yuree www.usc.edu/si CHAPTER 8: ENERGY AND METABOLISM 1. The molecule pictured on the right is AT F ATP + H2O ---+ ADP + Ir The breakdown ofATP is an [email protected]@)reaction with a free energy change o[]l kcal/mol. lG is po-siti""@ the reaction is E-neogPnonspontaneous. The energy feleased is used to perform work in a cell. CrboSe- $tS +l4rr8i\rons\0k ' ; _ . d F without enzyme. Label reactants, products, transition state, activation wi e'rt'1r ' energy and AG. 3. Which of the following is false about enzymes? a) In the induced fit model of enzyme-substrate interaction, the enzyme changes shape asthe substrate enters theactive site. b) Every enzyme will function optimally at a certain temperature and pH. c) Enzymes catalyze both spontaneous and nonspontaneous reactions. ($|,oiu"tors are ;hrlp.. enzymes" that help an enzyme increase the rateof a reaction. 6-.dar,\-ots ^-(q r\or\* Qne'1rtnes, jnnryres can work to inhibit or catalyzi acellular function. d'i{r'rr'c e' i':rrs 4. Penicillin binds to the enzyme transpeptidase, preventing the formation of bacterial walls and killing the bacteria. How would you determine if penicillin is a competitive or noncompetitive inhibitor? r / , 4o1r,ip€1i,i11q..v.,r.troi*.,c \',,,rdl rl.J tl'{'trlrt.. €';fe , Qrrercuur"nQ !r1 aw[r{-t''", $*b-q}-ati'< .r",ri'4nr,rpT:\i\iit'.;.;.''1;1,1t;E1ri5[SAO{d'.ir',.:,llli6i\c,c*erc-rrvr,nal,i'.'curu'--"1,\r--$'Y.i.l: Enzyme) Substrate 5. Product A in the above pathway can allosterically"bind to a molecule in the pathway, preventing more of Product A from being made. This is an example of t'ed.u-r"r ,,. . If each of the enzymes catalyze the formation of an intermediate, to which molecule should Product A bind to prevent Product A, but not Product B, from beingproduced? srcg "_v1.-.-3 CHAPTER 9: CELLULAR RESPIRATION 6. Redox Reactions OIL: Oxidation is loss of t[eo\nons or Vr.'.{c\veqev13 , or gain of 0X i4qe"{1 RIG:Reduction is gain of r\tr-\-<-oqrS or Vryc\,9_i\tv',t , or loss of__OX!atg4_. Intermediate A
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i1 | ). !.1 .j; ,,.i ;..1-. It*"i-l **t-1 + ii;\t,l' --*:*=:'--.-+ i..:ii t li;lllit *- ll" ri ln the above reaction, F\-c"c v, is oxidized and N) Abi is reduced. NA.b{ is the'oxidizing agent and H -i -og is the reducing agent. 1 7. What iS the goal of cell respiration? bCexl,* d'i:,,r"'r. r$;r.r.r,,$c, cr 6t(.ti t,r-f.l-' . { "r fi',6J+'{ e' 1e '1 d'il 8.cell respiration consists [email protected]#[rY$;itt'1i]r$;5al equation for cellular respiration: , ;f,ffi*:*'ffJ"*qac*u)* cror,,,-o,o ^\603. *- bf *;_ 16i-\-o + e,nerx,1 l. {\r.1coLq",r5 2. J,t, ,, t, i,d . ""' 3. 0XrdC,.*-,u*- rl!'oSp\'"or1\Alior, ) <...\r{.i;'sr.' l-{,.r. 1, c. 1)'.l*1- cl".fr,ii1 ?/;iv'-11,1','."r'{-8";r''c'di5 Which steps invdlve substrate-level phosphorylation?_f-3_ Oxidative phosphorylation? 3 .\ 10. Where in the mitochondria is thgplI{e lowest? I U\ :..:,frf e r;' (- ,rfilbr'c ,11{:'ii.rl'{nyr i" : pc{ {c' ) Which generates more ATP: ,faUn)FADHria Where is the elechon transport''-Chelfr--fufid in plant cells? \liirr i,.,,i r i rl d h prgkaryotes?
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