Enzyme inhibitors and Cofactors

Enzyme Inhibitors:
Enzyme inhibitors are substances that slow down or stop the activity of enzymes. They work by attaching to the enzyme and blocking its normal function, so the enzyme cannot properly bind with its substrate. This reduces the speed of chemical reactions in the body.

Some inhibitors compete with the substrate for the active site, while others attach to a different part of the enzyme and change its shape, making it less effective or completely inactive. In simple words, inhibitors act like a brake system that controls or stops enzyme activity when needed.

Cofactors:
Cofactors are non-protein substances that help enzymes work properly. Some enzymes cannot function on their own, so they need these helper molecules to become active.

Cofactors can be metal ions like magnesium or zinc, or they can be organic molecules called coenzymes. When cofactors bind with enzymes, they help the enzyme perform its job more efficiently, such as speeding up reactions or helping in the correct binding of substrate.

Without cofactors, many enzymes would not be able to work properly, while inhibitors reduce or stop enzyme activity when necessary. Both play important roles in controlling biological reactions.