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The substance that inactivates an enzyme by denaturing it is called
- a)Feedback inhibitor
- b)Competitive inhibitor
- c)Allosteric inhibitor
- d)Irreversible inhibitor
- e)None of these
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The substance that inactivates an enzyme by denaturing it is calleda)F...
An irreversible inhibitor permanently inactivates an enzyme by causing changes to its structure that prevent it from functioning properly. This can occur through covalent modification or binding to essential functional groups within the enzyme. Once the irreversible inhibitor binds to the enzyme, it cannot be easily removed, and the enzyme is permanently inactivated.
Feedback inhibitors, competitive inhibitors, and allosteric inhibitors are reversible inhibitors that can be overcome or reversed under certain conditions. They do not permanently denature the enzyme.
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The substance that inactivates an enzyme by denaturing it is calleda)F...
Understanding Enzyme Inactivation
Enzymes are biological catalysts that speed up chemical reactions in living organisms. However, certain substances can inactivate these enzymes, and it is crucial to understand how they work.
Types of Enzyme Inhibition
- Feedback Inhibitor: This type of inhibitor regulates metabolic pathways by binding to an enzyme involved in the pathway, usually at a site other than the active site. It does not necessarily denature the enzyme.
- Competitive Inhibitor: Competitive inhibitors bind to the active site of the enzyme, competing with the substrate. While they inhibit enzyme activity, they do not denature the enzyme.
- Allosteric Inhibitor: Allosteric inhibitors bind to a site other than the active site, causing a conformational change that decreases enzyme activity. They do not directly denature the enzyme.
Irreversible Inhibitor: The Correct Answer
- Definition: Irreversible inhibitors covalently bind to an enzyme, leading to permanent inactivation. This process often involves the denaturation of the enzyme, rendering it unable to perform its catalytic function.
- Mechanism: These inhibitors form strong covalent bonds with amino acid residues at or near the active site, causing structural changes that disrupt the enzyme’s function.
- Examples: Common irreversible inhibitors include certain drugs and toxins that permanently disable enzymes, affecting metabolic pathways.
Conclusion
In summary, the substance that inactivates an enzyme by denaturing it is indeed classified as an irreversible inhibitor. This is because it permanently alters the enzyme's structure, leading to a complete loss of activity, unlike other types of inhibitors that may be reversible or merely competitive. Understanding these distinctions is essential in biochemistry and pharmacology.
Enzymes are biological catalysts that speed up chemical reactions in living organisms. However, certain substances can inactivate these enzymes, and it is crucial to understand how they work.
Types of Enzyme Inhibition
- Feedback Inhibitor: This type of inhibitor regulates metabolic pathways by binding to an enzyme involved in the pathway, usually at a site other than the active site. It does not necessarily denature the enzyme.
- Competitive Inhibitor: Competitive inhibitors bind to the active site of the enzyme, competing with the substrate. While they inhibit enzyme activity, they do not denature the enzyme.
- Allosteric Inhibitor: Allosteric inhibitors bind to a site other than the active site, causing a conformational change that decreases enzyme activity. They do not directly denature the enzyme.
Irreversible Inhibitor: The Correct Answer
- Definition: Irreversible inhibitors covalently bind to an enzyme, leading to permanent inactivation. This process often involves the denaturation of the enzyme, rendering it unable to perform its catalytic function.
- Mechanism: These inhibitors form strong covalent bonds with amino acid residues at or near the active site, causing structural changes that disrupt the enzyme’s function.
- Examples: Common irreversible inhibitors include certain drugs and toxins that permanently disable enzymes, affecting metabolic pathways.
Conclusion
In summary, the substance that inactivates an enzyme by denaturing it is indeed classified as an irreversible inhibitor. This is because it permanently alters the enzyme's structure, leading to a complete loss of activity, unlike other types of inhibitors that may be reversible or merely competitive. Understanding these distinctions is essential in biochemistry and pharmacology.
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