Domanda del libro di testo
Explain how the following changes affect the rate of an enzyme-catalyzed reaction in the presence of an uncompetitive inhibitor:
(b) decreasing the inhibitor concentration at a constant substrate concentration.
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Ch.19 Enzymes and Vitamins
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 19, Problema 29b
Explain how the following mechanisms regulate enzyme activity.
b. Genetic control
Guida verificata passo dopo passo1
Understand that genetic control refers to the regulation of enzyme activity at the level of gene expression, meaning the production of enzymes is controlled by turning genes on or off.
Recognize that genes encode the instructions for synthesizing enzymes, and their expression can be influenced by factors such as environmental signals, cellular needs, or developmental stages.
Explain that when a gene is 'turned on' (expressed), the cell produces messenger RNA (mRNA) through transcription, which is then translated into the enzyme protein. Conversely, when a gene is 'turned off,' no enzyme is produced.
Discuss how genetic control can be a long-term regulatory mechanism, as it affects the amount of enzyme available in the cell rather than modifying the activity of existing enzymes.
Provide examples, such as the regulation of enzymes involved in lactose metabolism in bacteria (e.g., the lac operon), where the presence or absence of lactose determines whether the genes for lactose-digesting enzymes are expressed.
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Enzyme Regulation
Enzyme regulation refers to the various mechanisms that control the activity of enzymes, ensuring that metabolic processes occur at the right time and in the right amounts. This regulation can occur through several means, including allosteric regulation, covalent modification, and genetic control, which collectively help maintain homeostasis within the cell.
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2:14
Intro to Enzymes Concept 1
Genetic Control
Genetic control of enzyme activity involves the regulation of gene expression that encodes enzymes. This means that the synthesis of enzymes can be increased or decreased based on the cell's needs, often in response to environmental changes or developmental signals, allowing for precise control over metabolic pathways.
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03:25The Genetic Code Concept 1
Transcription and Translation
Transcription and translation are the two key processes through which genetic information is converted into functional proteins, including enzymes. Transcription involves copying DNA into messenger RNA (mRNA), while translation is the process where ribosomes synthesize proteins based on the sequence of the mRNA, ultimately determining the levels of enzyme activity in the cell.
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6:37Transcription: mRNA Synthesis Concept 1
Pratica correlata
Domanda del libro di testo
What type of enzyme regulation occurs in the following situations?
a. Buildup of the product of the pathway that converts glucose to pyruvate stops at the first enzyme in the multistep process.
962
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Domanda del libro di testo
What type of enzyme regulation occurs in the following situations?
d. Conversion of isocitrate to α-ketoglutarate is inhibited by high levels of ATP. (Hint: ATP is neither a product nor a substrate in this reaction.)
734
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Domanda del libro di testo
Answer questions (a)–(e) concerning the following reaction:
d. What is the product for the reaction as written?
1416
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Domanda del libro di testo
Explain how the following changes affect the rate of an enzyme-catalyzed reaction in the presence of an uncompetitive inhibitor:
(a) increasing the substrate concentration at a constant inhibitor concentration
1575
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Domanda del libro di testo
Name the vitamin to which each of these coenzymes is related.
b. Coenzyme A
948
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