5.12-5.15 quiz

It prevents the cell from wasting valuable resources by preventing it from synthesizing more of a particular product than is needed.

Explain an advantage of feedback inhibition to a cell.

Exergonic processes phosphorylate ADP to form ATP. ATP transfers energy to endergonic processes by phosphorylating other molecules.

Explain how ATP transfers energy from exergonic to endergonic processes in the cell.

An enzyme lowers the activation energy needed for a reaction when its specific substrate enters its active site. With an induced fit, the enzyme strains bonds that need to break or positions its substrates in an orientation that aids the conversion of reactants to products.

Explain how an enzyme speeds up a specific reaction.

The lower (red) curve. Line a is the activation is the activation energy without enzyme; b is the activation energy with enzyme; c is the change in energy between reactants and products, which is the same for both catalyzed and uncatalyzed reactions.

The graph below illustrates the course of a reaction with and without an enzyme. Which curve represents the enzyme-catalyzed reaction? What energy changes are represented by the lines labeled a, b, and c?