Domanda del libro di testo
The enzyme sucrase catalyzes the hydrolysis of the disaccharide sucrose but not the disaccharide lactose. Does the induced-fit or lock-and-key model explain the action of sucrase better? Explain.
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Ch.10 Proteins Workers of the Cell
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696
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TOC.tableOfContents
- Ch.4 Introduction to Organic Compounds75
- Ch.5 Chemical Reactions19
- Ch.6 Carbohydrates Life's Sweet Molecules62
- Ch.7 States of Matter and Their Attractive Forces8
- Ch.8 Solution Chemistry Sugar and Water Do Mix4
- Ch.10 Proteins Workers of the Cell89
- Ch.11 Nucleic Acids Big Molecules with a Big Role69
- Ch.12 Food as Fuel An Overview of Metabolism65
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Capitolo 6, Problema 90
What type of interactions between an enzyme and its substrate help to stabilize ES?
Guida verificata passo dopo passo1
Identify the types of interactions that can occur between an enzyme and its substrate, such as hydrogen bonds, ionic interactions, hydrophobic interactions, and van der Waals forces.
Understand that these interactions help to stabilize the enzyme-substrate (ES) complex by lowering the activation energy required for the reaction to proceed.
Consider how the enzyme's active site is specifically shaped to fit the substrate, allowing these interactions to occur effectively.
Recognize that the strength and number of these interactions can affect the enzyme's specificity and efficiency in catalyzing the reaction.
Reflect on how these interactions are reversible, allowing the enzyme to release the product after the reaction is complete, ready to bind to another substrate molecule.
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Enzyme-Substrate Complex
The enzyme-substrate complex (ES) is formed when an enzyme binds to its specific substrate. This interaction is crucial for catalyzing biochemical reactions. The stability of this complex is essential for the enzyme's efficiency, as it allows the reaction to proceed at a faster rate by lowering the activation energy required.
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Percorso guidato
2:32
Enzyme-Substrate Complex Concept 1
Binding Interactions
Binding interactions between an enzyme and its substrate include various forces such as hydrogen bonds, ionic interactions, hydrophobic effects, and van der Waals forces. These interactions help to stabilize the ES complex, ensuring that the substrate is held in the correct orientation for the reaction to occur. The strength and specificity of these interactions are key to enzyme function.
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2:41Interactions within the Tertiary Structure Concept 2
Induced Fit Model
The induced fit model describes how the binding of a substrate induces a conformational change in the enzyme, enhancing the fit between the two. This model suggests that the enzyme is flexible and can adjust its shape to better accommodate the substrate, which further stabilizes the ES complex and promotes catalytic activity.
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2:39Models of Enzyme Action Concept 1
Pratica correlata
Domanda del libro di testo
A substrate is held in the active site of an enzyme by attractive forces between the substrate and the amino acid side chains. For the outlined regions A, B, and C on the following substrate molecule:
b. Could the amino acids serine, lysine, or glutamate be present in the active site? Support your answer.
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Domanda del libro di testo
The enzyme trypsin catalyzes the breakdown of many structurally diverse proteins in foods. Does the induced-fit or lock-and-key model explain the action of trypsin better? Explain.
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Domanda del libro di testo
Do the amino acids that are in the active site of an enzyme have to be near each other in the enzyme’s primary structure? If no, explain.
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Domanda del libro di testo
Does each of the following statements describe a simple enzyme (no cofactor or coenzyme necessary), an enzyme that requires a cofactor, or an enzyme that requires a coenzyme?
c. contains vitamin B6 in its active site
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Domanda del libro di testo
Does each of the following statements describe a simple enzyme (no cofactor or coenzyme necessary), an enzyme that requires a cofactor, or an enzyme that requires a coenzyme?
b. consists of one polypeptide chain in its active form
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