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bmb3100-19980709-THU - ”a BIOIBCH 310 Second test...

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Unformatted text preview: ”a BIOIBCH 310 Second test. Thursday, July 9, 1998 1.(5} Draw the structure of the coenzyme NADH. H H “a 0 W “If”; I' I N”; 0 0"?"0'mih if 242) What disease Wwith its deficiency? 3.(14i Match: a. niacin Lantioxidant b. vitamin B12 _jzrcollagen stabilization C. ng2+ _transamination d. lipoic acid Lcarboxyl-group transfer e. vitamin K _€_blood coaguiation f. retinol (vitamin A) _g_birth defects _ mflé g. ascorbic acid Ltwo electron transfer 4' h. pyridoxal phosphate #semiquinone l. biotin Lmethyl transfer j. FAD 7 avidin k. folic acid Zacyl group transfer l. vitamin E ejj€£__fat soluble vitamin #night blindness 4.l8) Name: a. A measure of order ' ' , £4! (one word). b. Related to the equilibrium consta tilt-Z557 4'- - 2...“; (two or three words); a quantitativ measur- of the spont’ity of a reaction 0. Heat of combustion gfi% ,. (one word) d. A reaction is spontaneous if it is rflgfiWg (one word} 5.{3) The enthalpies of the reactions below are shown. What is the value of the missing enthalpy? 6.(5) Given the reaction: succinate + pyruvate —» lactate + fumarate Calculate the value of .QE‘r for this reaction. Half-reactions: ' E‘", volts of 1/: 02 + 2H+ + 2e‘—» H20 0.82 A; cytochrome c (ox) + e' _. cytochrome c (red.} 0.25 fumarate + 2H+ + 2e'—rsuccinate 0.03 ”003 pyruvate + 2H+ + 2e‘—h lactate -0.18 “0d? FAD + 2H+ + 28‘-* FADHZ -0.22 NAD+ + 2H+ + 2e'—- NADH + H+ -o.32 ‘ 01/ ”/47 2H+ + 2e-—a- H2 -o.42 7.{5) Calculate AG°' for the reaction, in kcal/mole. /wJ’{79/ do”; — 2.230;,(410 3 1‘ 9'53 L“! 8.(2) If AG‘“ is positive, are reactants (left side of arrow) or products (right side) in excess? .Mgfi 916) The free energy of hydrolysis of ATP is high. Give three reasons why this is so. . 10110) Draw the Haworth structures of beta-D-ribofuranose, alpha-D~galacto- pyranose, sucrose, lactose and maltose. HG CHLOH C/HLZ—OHO H0 3 OH HO 0 (VO h ' “Ego Ho | OH HO OH OH HOHzC j‘CHQOH H HOCHng) CHfifli CAEDH CHJQH \I\ X. \ H - L— O <"0 0H o 0H 0" on / q \J I a Doe-4' __T>MOH H 0” OH or! OH 11.(8) Write the reactions for the mutarotation of the anomeric carbon of D-glucose to two pyranose ring forms. Draw the structures of the a and ,8 forms of D- ribofuranose. CHO 0142.0: /—/ {fa/4 C/i—IDLOHJ 0- 0H )1 5:. £15ny 5:; or: NH H 0 OH / 63.5% H o L_{ OH cm H #120 H H0 H76 0 M H O o H 12. {8) Mannose fructose and galactose are converted to glycolytic intermediates. Describe the reactions involved in converting any two of these sugars to glycolytic intermediates G7 WW My? 7947?” % Ala/V Mam {raw/9P, P Emma’éfszéfl O/Mé CXOSLZ 7L X77 3’ 40/074 I‘d/XXX //" $ 49/4/4/9 + 9,413 / J, +ATP éflh QABP ”@Zflaca’m % Ar ~25) flpf¥ Mafia M ja/az)afg 0” 75 MW gala fry/w a» )1 / ,z 7:: 6/fl//2:/WJ/yx [/flf f/ {ckfflgi’ice 4:;M/7/ a 505/5- r 6,5“, M 96 / f) 4" ZXM/cmse 6/”- 13.(8) Write the reactions of the four enzymes which use ATP or form ATP during anaerobic glycolysis. 6%00056 7" I477) —*>" Gflczcflséx 6/0 7‘ AD” Fflwmé W 7L fl??? 6' 6:44-ch / atom/9%flfl/0 14.(6) Write the reactions of the enzymes which reduce NAD+ and oxidize NADH during anaerobic glycolysis in muscle and yeast. ”9 f CHO -/” C7, *0 F-flfl Hécw 7L/V/I’Dtkc *9AV0/7’t/L/ 7L MW M (Le/Jog? (2/4/12 5’0 } £15m Zuzfm pie 3/) / 3 [3 (EV/c x7 ‘ L @9754] JWJSfl/c’f) / + WM (7 :0 +N/20H7L H fifi/Cfifl/L/ 7L/I/flfl (17/3 H (Lt/3 F/ZMM /(z.&}flX/€, (ff + N’fl/‘fl7L/47Lé agjfipfl 7d My 3 aczWMJJ/io/IQ 145/ Lama” 15. (10) Write the overall reaction for the conversion of 0- glucose to two moles of lactate during anaerobic glycolysis. Write a second reaction for the conversion of D-glucose to two moles of pyruvate during aerobic glycolysis in the cytosol. 6Zuw£e 7L “mo/ovw/z; re ,2 Awe/a: hemp-7A 1/40 éfiggpfi 7L' 2fl0fl+ I? (/96 +92 A/flva—vr—év 7? @flaflfl/{S '/‘ Xflf/flffl/{QO - 7‘ A’49H+H+ ...
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