Practice Quiz on Reaction Coupling

Practice Quiz on Reaction Coupling - 1 .Inasimple...

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1 Consider an analogy between reaction coupling and money. In a simple  economy, barter provides a means of direct exchange of material goods. For  example, the owner of a cow may have excess milk and need eggs, whereas a  chicken owner has excess eggs and needs milk. Provided that these two people  are in close proximity and can communicate, they may exchange or barter eggs  for milk. But in a more complex economy, money serves as a mediator for the  exchanges of goods or services. For instance, the cow owner with excess milk  may not need other goods until three months from now, or may want goods from  someone who does not need milk. In this case, the “energy” from providing milk  to the economy can be temporarily “stored” as money, which is a form of 
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Unformatted text preview: “energy” used for many transactions in the economy. Using barter and money as analogies, describe two mechanisms that can serve to drive an unfavorable chemical reaction in the cell. 2 You are studying a biochemical pathway that requires ATP as an energy source. To your dismay, the reactions soon stop, partly because the ATP is rapidly used up and partly because an excess of ADP builds up and inhibits the enzymes involved. You are about to give up when the following table from a biochemistry textbook catches your eye. Which of the following reagents are most likely to revitalize your reaction? (a) a vast excess of ATP (b) glucose 6-phosphate and enzyme E (c) creatine phosphate and enzyme A (d) pyrophosphate...
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  • Summer '12
  • yang
  • three months, excess milk, excess eggs

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