How do enzymes act as catalyst to speed up biological reactions

Enzymes are biological catalysts. ... Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind. This is termed "induced fit", meaning that the precise orientation of the enzyme required for catalytic activity can be induced by the binding of the substrate.on:

Chemical reactions occur at the active site of enzymes, where a precise 3D orientation of amino acids is an important feature of catalysis.

Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate.

Activation energy is energy that must be added to get a reaction started, which is recovered as the reaction proceeds.

Enzymes can catalyze reactions through a variety of ways including destabilizing the bonds within the substrate.

Explanation:

usatestprep

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.