Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Chapter 12.5, Problem 3RIA
Summary Introduction
Nitrogen is a natural element denoted by symbol ‘N’. It has the atomic number of 7 in the periodic element chart. Nitrogen is found in all the organic forms which include cell system and its hereditary unit DNA (Deoxyribose
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Chapter 12 Solutions
Prescott's Microbiology
Ch. 12.1 - Prob. 1RIACh. 12.1 - Retrieve, Infer, Apply What is self-assembly? What...Ch. 12.3 - Retrieve, Infer, Apply Briefly describe the three...Ch. 12.3 - Retrieve, Infer, Apply Which two enzymes are...Ch. 12.4 - MICRO INQUIRY How might acetyl-CoA be used by the...Ch. 12.4 - Prob. 2MICh. 12.4 - MICROINQUIRY What is the difference between Lipid...Ch. 12.4 - Retrieve, Infer, Apply What is gluconeogenesis?...Ch. 12.4 - Retrieve, Infer, Apply Describe the formation of...Ch. 12.4 - Retrieve, Infer, Apply Suppose a microorganism is...
Ch. 12.4 - Retrieve, Infer, Apply Diagram the steps involved...Ch. 12.4 - Retrieve, Infer, Apply What would happen to a cell...Ch. 12.5 - What purpose is served for the cell when these...Ch. 12.5 - Prob. 2MICh. 12.5 - Prob. 1RIACh. 12.5 - How is nitrate assimilated? How does assimilatory...Ch. 12.5 - Prob. 3RIACh. 12.5 - How do organisms assimilate sulfur? How does...Ch. 12.5 - Prob. 5RIACh. 12.5 - Prob. 6RIACh. 12.5 - Describe the glyoxylate cycle. How is it similar...Ch. 12.5 - Prob. 8RIACh. 12.5 - List the types of organisms that use each...Ch. 12.6 - How is phosphorus assimilated? What roles do...Ch. 12.6 - Explain the difference between a purine and a...Ch. 12.6 - Outline the way in which purines and pyrimidines...Ch. 12.7 - Prob. 1RIACh. 12.7 - How are unsaturated fatty acids made?Ch. 12.7 - Briefly describe the pathways for triacylglycerol...Ch. 12.7 - Activated carriers participate in carbohydrate,...Ch. 12.7 - Prob. 5RIACh. 12 - What would happen if a microorganism that depended...Ch. 12 - Intermediary carriers are in a limited supply:...Ch. 12 - Magnetotactic bacteria are morphologically and...
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- How is phosphorus assimilated? What roles do phosphatases play in phosphorus assimilation? Why can phosphate be directly incorporated into cell constituents, whereas nitrate, nitrogen gas, and sulfate cannot?arrow_forwarda) Based on the mechanism shown in Figure 2A, what type of enzyme is transpeptidase? : Lyase Isomerase Ligase Hydrolase Oxidoreductase Transferase b) Transpeptidases have two substrates. From Figure 2A, what type of mechanism do they most likely adopt in processing the two substrates? sequential or ping-pong c) β-lactams inactivate transpeptidases by forming a covalent bond with the serine residue in the active site. Based on this description and Figure 2B caption, what type of inhibitor are β-lactams? _________________________________________ d) Based on the mechanism for lactamase shown in Figure 3, what type of enzyme is lactamase? Lyase Isomerase Ligase Hydrolase Oxidoreductase Transferase e) Based on your answer in d, what other reactant, in addition to the antibiotic substrate, needs to be in the active site of lactamase for the hydrolysis reaction to proceed? ____________________arrow_forwardWhy is gluconeogenesis labeled as enzymatic by-pass reactions?arrow_forward
- Describe type I, II, and III L-asparaginases. Mention characteristics and differences between them with respect to enzyme kinetics (rate, km, etc).arrow_forwardWhat is the committed step of pyrimidine biosynthesis? Include the names and structures of any product(s), substrate(s), and cofactors, and the name of the enzyme responsible.arrow_forward. The mechanism for lysozyme cleavage of its polysaccharide substrate requires Glu35 in its nonionized form, whereas the nearby Asp52 must be ionized (see the figure below). The pK values for the side-chain carboxyl groups on the two amino acids in solution are virtually identical. a) How can one carboxyl group be charged and the other uncharged in the active site of lysozyme? b) The pH optimum for lysozyme is about 5. Why do you suppose that the activity decreases above and below this optimum? Glu3s NAG Asp52 0-H Glu35 -C Asp52 tri-NAG NAGarrow_forward
- What is the general definition of an uncoupler protein? In the context of oxidative phosphorylation, what do uncoupler proteins do, and how do certain cells utilize them for the benefit of an organism?arrow_forwardIdentify the substrate and products of the TCA cycle. Describe its organization in general terms. What are its major functions?arrow_forwardIdentify the two components of the nitrogenase complex and describe their specific tasks.arrow_forward
- Nitrogenase complexes are irreversibly inactivated by oxygen. Explain how nitrogen-fixing bacteria solve this problem.arrow_forwardWhat are the fates of carbons from the ketogenic amino acids? And Name three degradation intermediates of tryptophan that play important biologicalroles.arrow_forwardWhich amino acid is an ideal substrate for the oxidative deamination reaction?arrow_forward
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