Consider the biochemical pathway used to synthesize the amino acid proline. an increase in the concentration of proline will most likely lead . a decrease in proline production. b. increased breakdown of proline. c. a further increase in proline production. d. no change in the rate of proline production.

A. Decrease in proline production

Explanation:

This occurs as a result of the feedback inhibition which is a cellular control mechanism where enzyme activity is inhibited by the enzyme’s end product thus allowing cells to regulate how much of an enzyme’s end product is produced.  Typically, feedback inhibition acts on the first enzyme unique to a given pathway. For example, in the case of amino acid production, an amino acid may act as an inhibitor for the first enzyme in the pathway whose purpose is making more of that amino acid.

Feedback inhibition is usually achieved through an “allosteric site” – a site on an enzyme that changes the shape of the enzyme, and subsequently the behavior of the active site, therefore, in feedback inhibition, binding of the end product to this site slows down or stops the enzyme’s activity so that little or no new end product is produced causing a product drop

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explanation:

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.