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1. What processes maintain the cellular concentration of ATP? Be concise. 2. Why don't "high-energy" compounds such as phosphoenolpyruvate and

Hey can you please help me again with biochemistry, i will attach  the file let me know if you can do it  

1. What processes maintain the cellular concentraTon of A±P? Be concise. 2. Why don’t “high-energy” compounds such as phosphoenolpyruvate and phosphocreaTne break down quickly under physiological condiTons? 3. A metabolic reacTon A↔ B has ∆G°’ = 7.5 kJ/mol a) Calculate K eq for the reacTon at 25°C b) Calculate ∆G for the reacTon at 37°C, when [A] = 0.5 mM and [B] = 0.1 mM. Is the reacTon spontaneous under these condiTons? c) How can the reacTon’s direcTon be changed in the cell (without changing ±)? 4. ±he amount of A±P in muscle can maintain acTvity for about a second. CreaTne phosphate (in vertebrate muscle) serves as a store of high-energy phosphoryl groups that can be transferred to ADP. Predict whether creaTne kinase will operate in the direcTon of A±P synthesis or phosphocreaTne synthesis at 25°C, when [A±P] = 4 mM, [ADP] = 0.15 mM, [phosphocreaTne] = 2.5 mM and [creaTne] = 1 mM. PhosphocreaTne + ADP ↔ creaTne + A±P [∆G°’ you can calculate this from values on the table - next page] 5. ±he following reacTon takes place during fa²y acid biosynthesis. 1
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a) Which electron carrier would you use: NAD + , NADH, FAD, FADH 2 , NADP + or NADPH? JusTfy which member of the pair you will use (for example, FAD or FADH 2 ) as well as which electron carrier in parTcular. b) Draw the complete half reacTon for the electron carrier you chose. Make sure you draw clearly the ring structures that parTcipate in the electron transfer. 6. Consider the reacTon: A±P + pyruvate ↔ phosphoenolpyruvate (PEP) + ADP a. Calculate ∆G°’ and K’ eq at 25C using data in the table to the right. b. What is the equilibrium raTo of pyruvate to PEP if the raTo of A±P to ADP is 10? 2
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bioenergetics.doc

1. What processes maintain the cellular concentration of ATP? Be concise. Substrate level phosphorylation for immediate energy sources such creatinine phosphate
Non-oxidative systems such as...

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