Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein.

Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme.

Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate.

Non-competitive inhibitors often bind to the enzyme irreversibly.

base-sugar-phosphate

base-sugar-OH

(base-sugar-phosphate)

sugar-phosphate

some bacteria, algae and green plant cells

fungi, algae and green plant cells

all bacteria, fungi and algae

viruses, fungi and bacteria.

During G₂ stage of prophase

During S-phase

During entire prophase

During telophase