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The inhibitor which does not resemble the substrate in structure and binds to the enzyme at site other than the active site is called
- a)Competitive inhibitor
- b)Non-competitive inhibitor
- c)Activator
- d)Substrate analogue
Correct answer is option 'B'. Can you explain this answer?
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The inhibitor which does not resemble the substrate in structure and b...
In non-competitve inhibition, the inhibitor binds at a site other than the active site ob the enzyme surface. This binding impairs the enzyme function. The inhibitor has no structural resemblance with the sunstrate. It does not interfere with the enzyme-substrate binding but the catalysis is prevented, possibly due to a distortion in the enzyme conformation. Non-competitive inhibition is usually irreversible because it cannot be overcome by increasing the substrate concentration. The inhibitor (l) generally binds with the enzyme as well as the ES complex. The overall relation in non.competitve inhibition is represented as :
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The inhibitor which does not resemble the substrate in structure and b...
Non-competitive inhibitor:
Non-competitive inhibitors are molecules that bind to an enzyme at a site other than the active site. They do not resemble the substrate in structure. These inhibitors inhibit enzyme activity by changing the shape of the enzyme, making it less effective in catalyzing the reaction.
Mechanism of action:
- Non-competitive inhibitors bind to the enzyme at an allosteric site, causing a conformational change in the enzyme.
- This conformational change may prevent the substrate from binding to the active site or inhibit the catalytic activity of the enzyme.
- Since non-competitive inhibitors do not compete with the substrate for the active site, increasing substrate concentration will not overcome their inhibitory effect.
Characteristics:
- Non-competitive inhibitors do not compete with the substrate for binding to the enzyme.
- They can bind to the enzyme-substrate complex as well as the free enzyme.
- The inhibition by non-competitive inhibitors is not easily reversible.
- These inhibitors are not affected by changes in substrate concentration.
Examples:
- Heavy metal ions like mercury and lead are examples of non-competitive inhibitors.
- Drugs like aspirin and certain antibiotics also act as non-competitive inhibitors of specific enzymes.
In conclusion, non-competitive inhibitors are molecules that bind to an enzyme at a site other than the active site, causing a conformational change that inhibits enzyme activity.
Non-competitive inhibitors are molecules that bind to an enzyme at a site other than the active site. They do not resemble the substrate in structure. These inhibitors inhibit enzyme activity by changing the shape of the enzyme, making it less effective in catalyzing the reaction.
Mechanism of action:
- Non-competitive inhibitors bind to the enzyme at an allosteric site, causing a conformational change in the enzyme.
- This conformational change may prevent the substrate from binding to the active site or inhibit the catalytic activity of the enzyme.
- Since non-competitive inhibitors do not compete with the substrate for the active site, increasing substrate concentration will not overcome their inhibitory effect.
Characteristics:
- Non-competitive inhibitors do not compete with the substrate for binding to the enzyme.
- They can bind to the enzyme-substrate complex as well as the free enzyme.
- The inhibition by non-competitive inhibitors is not easily reversible.
- These inhibitors are not affected by changes in substrate concentration.
Examples:
- Heavy metal ions like mercury and lead are examples of non-competitive inhibitors.
- Drugs like aspirin and certain antibiotics also act as non-competitive inhibitors of specific enzymes.
In conclusion, non-competitive inhibitors are molecules that bind to an enzyme at a site other than the active site, causing a conformational change that inhibits enzyme activity.
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The inhibitor which does not resemble the substrate in structure and binds to the enzyme at site other than the active site is calleda)Competitive inhibitorb)Non-competitive inhibitorc)Activatord)Substrate analogueCorrect answer is option 'B'. Can you explain this answer?
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