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Questions and Answers
What is the term for the specific sequence in which enzyme-catalyzed reactions occur in a cell?
biochemical pathway
What happens when the end product of a pathway becomes available in the environment?
Cells shut down the pathway
How does feedback inhibition work in the context of biochemical pathways?
The end product of the pathway reacts with the first enzyme unique to the pathway
What is the site on the enzyme where the end product of the pathway binds to shut down the pathway?
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What happens to the enzyme when the end product binds to the allosteric site?
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Study Notes
- Enzyme-catalyzed reactions in a cell, such as those involved in amino acid biosynthesis, occur in a specific sequence called a biochemical pathway.
- In these pathways, the product of one reaction serves as the substrate for the next reaction.
- If the end product of a pathway, like an amino acid, becomes available in the environment, it is unnecessary for the cells to continue producing it, leading to pathway shutdown.
- Feedback inhibition is a mechanism used by cells to prevent unnecessary production of pathway end products.
- The end product of a pathway binds to the first enzyme unique to the pathway at an allosteric site.
- Upon binding, the enzyme undergoes a conformational change, preventing it from reacting with its substrate and halting subsequent steps in the pathway.
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Description
Explore your understanding of biochemical pathways, feedback inhibition, and enzyme-catalyzed reactions with this quiz. Test your knowledge of how cells regulate the production of pathway end products and the mechanisms involved in preventing unnecessary production.
