Enzyme Inhibition and Cofactors

6 Questions

By competing with the substrate for the active site

To function in some crucial way to allow catalysis to occur

The surface area decreases

Out of the cell, driven by active transport

They bind to another part of the enzyme and change its shape

To transport molecules across the cell membrane

Study Notes

Competitive inhibition occurs when reversible inhibitors, which are chemically similar to the normal substrate molecule, compete with the substrate for the active site on an enzyme, reducing its efficiency.

Noncompetitive inhibition: occurs when inhibitors bind to another part of the enzyme, causing a shape change that makes the active site nonfunctional, impeding enzyme activity.

Cofactors are non-protein helpers, including metal ions like zinc, iron, and copper, which function in a crucial way to allow catalysis to occur, serving as enzyme helpers.

As cell volume increases, the surface area decreases, which is why cells are typically small.

Proton pump cotransport is a type of transport that uses H+ ions and occurs in various cellular processes.
H+ ions are involved in active transport, moving from an area of high concentration to an area of low concentration (in or out).
In cotransport, H+ ions come in (passive transport) and are associated with cotransport mechanisms.

6 Questions