Concept explainers
Interpretation:
The difference between glutaminase and glutamine synthetase is to be discussed.
Concept introduction:
Enzymes such as glutaminase and glutamine synthetase are involved in the
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Chapter 23 Solutions
Owlv2,1 Term Printed Access Card For Campbell/farrell/mcdougal's Biochemistry, 9th
- REFLECT AND APPLY Outline the methods you would use to pro- duce human growth hormone (a substance used in the treatment of dwarfism) in bacteria.arrow_forwardRECALL What is qPCR?arrow_forwardREFLECT AND APPLY You are in the process of determining the amino acid sequence of a protein and must reconcile contradictory results. In one trial, you determine a sequence with glycine as the N-terminal amino acid and asparagine as the C-terminal amino acid. In another trial, your results indicate phenylalanine as the N-terminal amino acid and alanine as the C-terminal amino acid. How do you reconcile this apparent contradiction?arrow_forward
- REFLECT AND APPLY Is amino acid activation energetically favored? Why or why not?arrow_forwardREFLECT 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 How can the synthesis and breakdown of fructose-2,6-bisphosphate be controlled independently?arrow_forward
- REFLECT AND APPLLY What is the metabolic advantage of having both hexokinase and glucokinase to phosphorylate glucose?arrow_forwardREFLECT AND APPLY Would you expect mRNA or rRNA to be degraded more quickly in the cell? Why?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_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 The fidelity of protein synthesis is assured twice during protein synthesis. How and when?arrow_forwardREFLECT AND APPLY The amino acid hydroxyproline is found in collagen. There is no codon for hydroxyproline. Explain the occurrence of this amino acid in a common protein.arrow_forward
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage Learning