Question

just checking my answers, except for number 10.

The common molecule produced from all foods at the second stage of catabolism is A) ADP. B acetyl-CoA. C) glucose. D) citric acid. Which group of compounds includes only low-energy molecules? 1. 2. Hih A)ATP; acetyl-CoA; NADH; FADH2 C) ADP: CO2; NADH; FADH2 DONO BADP: acetyl-CoA; NAD+:FAD-mau ADP: CO2: NAD+, FAD After O2 has been reduced in the electron transport chain, the oxygen atoms are part of what molecules? A) ATP 3. C) carbon dioxide D) acetate water The driving force which provides the energy for synthesis of ATP in the fourth stage of 4. metabolism is the A) exergonic conversion of ADP to ATP B) energy difference between reduced carbon atoms and oxidized carbon atoms. concentration gradient of hydrogen ions between the two sides of the inner mitochondrial membrane D) concentration difference in oxygen between the cell and the intercellular fluid. 5. In which two steps of the citric acid cyclé are molecules of carbon dioxide produced? A) steps two and fiveB) steps three and five teps three and four D) steps four and six 6. The "fuel"' for the citric acid cycle is A acetyl CoA The number of membrane-bound protein complexes associated with the electron transport chain A) one B) citric acid C) citrate ion D) oxaloacetate ion 7. IS B) two D) four C) three Printed at Camden County College 8. In which of the following citric acid eycle reactions does the coenzyme FAD participate? ), citrate → isocitrate B) succinate fumarate malate -+ oxaloacetate D). more than one correct response 9. How many NADH and FADH, molecules are produced, respectively, during one turn of the citric acid cycle? A). two, two three, one C), one, three D) two, three 10. The hydrolysis of creatine phosphate is coupled with the synthesis of ATP. The equations for the reactions are given below. Would this coupling be favored? Explain briefly your answer. Creatine phosphate + H2O → Creatine + H0PO3-2 ΔG =-10.3 kcal mol ΔG = +7.3 kcal/mol -ADP + HOPO3-2 + H+ → ATP + H2O

Answer 1

p fats, Carbohydrates a Protein, "on cato bolism Iroduces , La a common molecule Acetyl CoA High ny compound,> ATP, Acetyl Cof, NADIH, FADH, Low Energy compound - AOP, co, , NAD, fAD it joins with two Ht to form H20 lendy to formation of ATP across inner mi to c hondrial 23 3n El lection transport chain , aer 02 has been reduced 44 3t is the gradient difference of Proton which he giadien membrane. This is akso called Proton motive force 5 Puruvic acid Citrate Oxaloacetate H20 Cis. Aconiłate N Ap na lso cit ot,e 12o Malate Hp Ap fumarate ADH Co a- keto toiade Succ inate NAD NAD Co A

In step three and bur︺ CO2 is produce d. This steh is abo calbled De carboxy lation 6) Acetyl Co A is the fuel for Cihic acid yecle 7) There ae foor mem biane bound Prodein Comple xe Electro ntran) þort chain ωǐ th aDocialed i e. Complex , Complex Complex , (omplex v 3) As in figune co@nzyme AD parteipate in → fumarate Su ccinadefum 3) A国 ǐnfigure, there are three NADH·yone FADH2 molecole is Produced