Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 18, Problem 40RE
Interpretation Introduction
Interpretation:
The action of allosteric effectors differing in the reactions catalyzed by phosphofructokinase and fructose-1,2-biphosphatase is to be explained.
Concept introduction:
Allosteric effectors are the molecules that bind with one of the active sites of an enzyme that are responsible for an appreciable change on the conformation and binding properties of another active site, of the same enzyme. This change affects the affinity of the enzyme to its substrate.
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Biochemistry
Ch. 18 - RECALL Why is it essential that the mechanisms...Ch. 18 - RECALL How does phosphorolysis differ from...Ch. 18 - RECALL Why is it advantageous that breakdown of...Ch. 18 - RECALL Briefly outline the role of UDPG in...Ch. 18 - RECALL Name two control mechanisms that play a...Ch. 18 - REFLECT AND APPLY Does the net gain of ATP in...Ch. 18 - REFLECT AND APPLY In metabolism,...Ch. 18 - Prob. 8RECh. 18 - BIOCHEMICAL CONNECTIONS You are planning to go on...Ch. 18 - BIOCHEMICAL CONNECTIONS Would eating candy bars,...
Ch. 18 - Prob. 11RECh. 18 - Prob. 12RECh. 18 - REFLECT AND APPLY A researcher claims to have...Ch. 18 - REFLECT AND APPLY What is the source of the energy...Ch. 18 - Prob. 15RECh. 18 - Prob. 16RECh. 18 - Prob. 17RECh. 18 - Prob. 18RECh. 18 - Prob. 19RECh. 18 - RECALL What reactions in this chapter require...Ch. 18 - RECALL Which steps of glycolysis are irreversible?...Ch. 18 - RECALL What is the role of biotin in...Ch. 18 - RECALL How does the role of glucose-6-phosphate in...Ch. 18 - REFLECT AND APPLY Avidin, a protein found in egg...Ch. 18 - REFLECT AND APPLY How does the hydrolysis of...Ch. 18 - Prob. 26RECh. 18 - Prob. 27RECh. 18 - Prob. 28RECh. 18 - Prob. 29RECh. 18 - Prob. 30RECh. 18 - Prob. 31RECh. 18 - REFLECT AND APPLY How can different time scales...Ch. 18 - REFLECT AND APPLY How do the control mechanisms in...Ch. 18 - Prob. 34RECh. 18 - Prob. 35RECh. 18 - Prob. 36RECh. 18 - REFLECT AND APPLY How can the synthesis and...Ch. 18 - REFLECT AND APPLY How is it advantageous for...Ch. 18 - Prob. 39RECh. 18 - Prob. 40RECh. 18 - Prob. 41RECh. 18 - Prob. 42RECh. 18 - RECALL What roles do glucagon and epinephrine play...Ch. 18 - Prob. 44RECh. 18 - RECALL List three differences in structure or...Ch. 18 - RECALL What are four possible metabolic fates of...Ch. 18 - BIOCHEMICAL CONNECTIONS What is the connection...Ch. 18 - Prob. 48RECh. 18 - RECALL What is a major difference between...Ch. 18 - Prob. 50RECh. 18 - Prob. 51RECh. 18 - Prob. 52RECh. 18 - REFLECT AND APPLY Suggest a reason why a different...Ch. 18 - REFLECT AND APPLY Explain how the pentose...Ch. 18 - REFLECT AND APPLY Why is it reasonable to expect...Ch. 18 - REFLECT AND APPLY How would it affect the...
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- REFLECT AND APPLY How does the hydrolysis of fructose-1,6-bisphosphate bring about the reversal of one of the physiologically irreversible steps of glycolysis?arrow_forwardRECALL Which pathways are involved in the anaerobic metabolism of glucose? Which pathways are involved in the aerobic metabolism of glucose?arrow_forwardREFLECT AND APPLY The intermediates of glycolysis are phosphorylated, but those of the citric acid cycle are not. Suggest a reason why.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 Describe the role of the F1 portion of ATP synthase in oxidative phosphorylation.arrow_forwardREFLECT AND APPLY Comment on the fact that the reduction of pyruvate to lactate, catalyzed by lactate dehydrogenase, is strongly exergonic (recall this from Chapter 15), even though the standard free-energy change for the half reaction Pyruvate+2H++2eLactate is positive (G=36.2kJmol1=8.8kcalmol1), indicating an endergonic reaction.arrow_forward
- RECALL Outline the role of carnitine in the transport of acyl-CoA molecules into the mitochondrion. How many enzymes are involved? What are they called?arrow_forwardREFLECT AND APPLY Avidin, a protein found in egg whites, binds to biotin so strongly that it inhibits enzymes that require biotin. What is the effect of avidin on glycogen formation? On gluconeogenesis? On the pentose phosphate pathway?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
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