Negative & Positive Feedback quiz Flashcards

Negative feedback is when the final product of a metabolic pathway inhibits an earlier step in the same pathway.

Negative feedback acts like a red light, stopping or slowing down the metabolic pathway.

The final product inhibits an earlier enzyme in the same metabolic pathway to decrease its own production.

The negative sign represents inhibition, blocking or slowing down an enzyme in the pathway.

Negative feedback is important because it helps regulate the production of the final product, preventing overproduction.

Feedback inhibition is when the products of a pathway interact with the pathway itself to regulate its function.

No, often only a single product of the pathway is needed to regulate that pathway.

The products bind to an allosteric site, not the active site, to prevent enzyme activity.

Feedback inhibition is crucial for regulating many biological pathways and processes.

Inhibiting an earlier step leads to decreased production of the final product.

A molecule like ATP (Adenosine Triphosphate) can be regulated by negative feedback to control energy production.

Negative feedback inhibits a pathway to decrease product production, while positive feedback amplifies a pathway to increase product production.

Negative feedback helps maintain homeostasis by regulating metabolic pathways and preventing excessive accumulation of products.

Enzymes are inhibited by the final product in negative feedback, which slows down or stops the metabolic pathway.

An allosteric site is a site on an enzyme where a product binds to inhibit the enzyme's activity, distinct from the active site.

An example of positive feedback in the lumen of the stomach is the secretion of gastrin, which stimulates the production of gastric acid, further enhancing the secretion of gastrin.

Feedback inhibition of a metabolic pathway is a form of negative feedback where the final product inhibits an earlier step in the pathway, reducing the production of the final product.

Feedback regulation of a metabolic pathway can involve either negative feedback, where the final product inhibits an earlier step, or positive feedback, where the final product stimulates an earlier step, affecting the pathway's activity.