Domanda del libro di testo
_______ is a cyclic series of eight reactions involved in the catabolism of acetyl-CoA that yields eight molecules of NADH and two molecules of FADH2.
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Ch. 5 - Microbial Metabolism
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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TOC.tableOfContents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
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Capitolo 5, Problema 5
Explain the mechanism of negative feedback with respect to enzyme action.
Guida verificata passo dopo passo1
Begin by defining negative feedback in the context of enzyme action: it is a regulatory mechanism where the end product of a metabolic pathway inhibits an enzyme involved earlier in the pathway to prevent overproduction.
Identify the key components involved: the enzyme (usually an early enzyme in the pathway), the substrate, and the end product that acts as the feedback inhibitor.
Explain how the end product binds to the enzyme at a site other than the active site, known as the allosteric site, causing a conformational change that reduces the enzyme's activity.
Describe how this reduction in enzyme activity decreases the conversion of substrate to product, thereby lowering the concentration of the end product.
Conclude by noting that when the concentration of the end product falls below a certain level, the inhibition is relieved, allowing the enzyme to become active again and the pathway to proceed, thus maintaining homeostasis.
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Enzyme Action
Enzymes are biological catalysts that speed up chemical reactions by lowering activation energy. They bind to specific substrates at their active sites, forming enzyme-substrate complexes, which then convert substrates into products efficiently.
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02:55
Enzymes
Negative Feedback Mechanism
Negative feedback is a regulatory process where the end product of a pathway inhibits an earlier step to maintain balance. This prevents overproduction by reducing enzyme activity when sufficient product accumulates.
Video consigliato:
02:41Negative Feedback
Allosteric Regulation in Enzymes
Allosteric regulation involves molecules binding to sites other than the active site, causing conformational changes that alter enzyme activity. In negative feedback, the product often acts as an allosteric inhibitor, decreasing enzyme function to control the pathway.
Video consigliato:
05:03Enzyme Inhibition
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