Concept explainers
REFLECT AND APPLY Consider the reaction
The
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BIOCHEMISTRY (LOOSELEAF) >CUSTOM PKG<
- REFLECT AND APPLY Why is it somewhat misleading to study bio- chemical pathways separately?arrow_forwardREFLECT AND APPLLY What is the metabolic advantage of having both hexokinase and glucokinase to phosphorylate glucose?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 How can the synthesis and breakdown of fructose-2,6-bisphosphate be controlled independently?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 Give two reasons why enzyme catalysts are 103 to 105 more effective than reactions that are catalyzed by, for example, simple H+orOH.arrow_forwardREFLECT AND APPLY The enzyme D-amino acid oxidase has a very high turnover number because the D-amino acids are potentially toxic. The KM for the enzyme is in the range of 1 to 2 mM for the aromatic amino acids and in the range of 15 to 20 mM for such amino acids as serine, alanine, and the acidic amino acids. Which of these amino acids are the preferred substrates for the enzyme?arrow_forwardREFLECT AND APPLY Does the net gain of ATP in glycolysis differ when glycogen, rather than glucose, is the starting material? If so, what is the change?arrow_forward
- REFLECT AND APPLY Albert Szent-Gyorgi, a pioneer in early photosynthesis research, stated, What drives life is a little electric current, kept up by the sunshine. What did he mean by this?arrow_forwardREFLECT AND APPLY Other things being equal, what is a potential disadvantage of an enzyme having a very high affinity for its substrate?arrow_forwardREFLECT AND APPLY Glycogen is highly branched. What advantage, if any, does this provide an animal?arrow_forward
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage Learning