Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Textbook Question
Chapter 15, Problem 21RE
REFLECT AND APPLY Would you expect the production of sugars by plants in photosynthesis to be an exergonic or endergonic process? Give the reason for your answer.
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Chapter 15 Solutions
Biochemistry
Ch. 15 - RECALL Is there a connection between the...Ch. 15 - REFLECT AND APPLY What do the following indicators...Ch. 15 - REFLECT AND APPLY Consider the reaction...Ch. 15 - RECALL What conditions are necessary for the...Ch. 15 - REFLECT AND APPLY Why is it important that energy...Ch. 15 - RECALL Why is it necessary to define a modified...Ch. 15 - RECALL Which of the following statements is (are)...Ch. 15 - RECALL How can you tell if the standard Gibbs free...Ch. 15 - RECALL Can the thermodynamic property G be used to...Ch. 15 - MATHEMATICAL Calculate G for the following values...
Ch. 15 - Prob. 11RECh. 15 - MATHEMATICAL Consider the reaction AB+C, where...Ch. 15 - Prob. 13RECh. 15 - MATHEMATICAL The G for the reaction Citrate ...Ch. 15 - MATHEMATICAL If a reaction can be written AB, and...Ch. 15 - Prob. 16RECh. 15 - Prob. 17RECh. 15 - Prob. 18RECh. 15 - RECALL Organize the following words into two...Ch. 15 - Prob. 20RECh. 15 - REFLECT AND APPLY Would you expect the production...Ch. 15 - Prob. 22RECh. 15 - REFLECT AND APPLY Adult humans synthesize large...Ch. 15 - RECALL Identify the molecules oxidized and reduced...Ch. 15 - RECALL For each of the reactions in Question 24,...Ch. 15 - Prob. 26RECh. 15 - RECALL What is the structural difference between...Ch. 15 - RECALL How does the difference between NADH and...Ch. 15 - RECALL Which coenzyme is a reactant in the...Ch. 15 - Prob. 30RECh. 15 - Prob. 31RECh. 15 - Prob. 32RECh. 15 - REFLECT AND APPLY The following half reactions...Ch. 15 - Prob. 34RECh. 15 - REFLECT AND APPLY There is a reaction in...Ch. 15 - REFLECT AND APPLY There is a reaction in which...Ch. 15 - Prob. 37RECh. 15 - Prob. 38RECh. 15 - Prob. 39RECh. 15 - Prob. 40RECh. 15 - MATHEMATICAL Using the data in Table 15.1,...Ch. 15 - Prob. 42RECh. 15 - Prob. 43RECh. 15 - MATHEMATICAL The standard free-energy change for...Ch. 15 - Prob. 45RECh. 15 - Prob. 46RECh. 15 - Prob. 47RECh. 15 - REFLECT AND APPLY Would you expect an increase or...Ch. 15 - REFLECT AND APPLY Explain and show why...Ch. 15 - Prob. 50RECh. 15 - Prob. 51RECh. 15 - Prob. 52RECh. 15 - Prob. 53RECh. 15 - REFLECT AND APPLY Why are thioesters considered...Ch. 15 - Prob. 55RECh. 15 - REFLECT AND APPLY This is a conjectural question:...
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- REFLECT AND APPLY If photosynthesizing plants are grown in the presence of 14CO2, is every carbon atom of the glucose that is produced labeled with the radioactive carbon? Why or why not?arrow_forwardREFLECT AND APPLY In biochemistry, the exergonic process of converting glucose and oxygen to carbon dioxide and water in aerobic metabolism can be considered the reverse of photosynthesis, in which carbon dioxide and water are converted to glucose and oxygen. Do you expect both processes to be exergonic, both endergonic, or one exergonic and one endergonic? Why? Would you expect both processes to take place in the same way? Why?arrow_forwardREFLECT AND APPLLY Is the reaction of 2-phosphoglycerate to phosphoenolpyruvate a redox reaction? Give the reason for your answer.arrow_forward
- REFLECT AND APPLY Would nature rely on the same enzyme to catalyze a reaction either way (forward or backward) if the DG were 0.8kcalmol1? If it were 5.3kcalmol1?arrow_forwardREFLECT AND APPLY Metabolic cycles are rather common (Calvin cycle, citric acid cycle, urea cycle). Why are cycles so useful to organisms?arrow_forwardREFLECT AND APPLY Why is it useful to plot rate data for enzymatic reactions as a straight line rather than as a curve?arrow_forward
- REFLECT AND APPLY What do the following indicators tell you about whether a reaction can proceed as written? (a) The standard free-energy change is positive. (b) The free-energy change is positive. (c) The reaction is exergonic.arrow_forwardREFLECT AND APPLY Suggest a reason why a different reducing agent (NADPH) is used in anabolic reactions rather than NADH, which plays a role in catabolic ones.arrow_forwardREFLECT AND APPLY Explain how the pentose phosphate path- way can respond to a cells need for ATP, NADPH, and ribose-5- phosphate.arrow_forward
- REFLECT AND APPLY The malate-aspartate shuttle yields about 2.5 moles of ATP for each mole of cytosolic NADH. Why does nature use the glycerol-phosphate shuttle, which yields only about 1.5 moles of ATP?arrow_forwardRECALL Which of the following are spontaneous processes? Explain your answer for each process. (a) The hydrolysis of ATP to ADP and Pi Pi (b) The oxidation of glucose to CO2 and H2O by an organism (c) The phosphorylation of ADP to ATP (d) The production of glucose and O2 from CO2 and H2O in photosynthesisarrow_forwardREFLECT AND APPLY Show how the reactions of the electron transport chain differ from those in Question 3 when FADH2 is the starting point for electron transport. Show how the reactions that liberate enough energy to drive the phosphorylation of ADP differ from the pathway when NADH is the starting point.arrow_forward
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