Does glycolysis occur inside or outside the mitochondria

Glycolysis occurs outside the mitochondria in the cytoplasm of the cell.

Glycolysis is a metabolic process in which glucose is broken down into two molecules of pyruvate ( 3 carbon containing molecule) and produces energy molecules as 2 ATP ( adenosine triphosphate) and 2 NADH molecules. Glucose is one of the most important energy fuel that is utilized by living organisms.

Glycolysis occurs in the cytoplasm of all living cells. Thus, it occurs outside the mitochondria.

The biological membranes like the cell membrane or the membrane enclosing the organelles are all semi-permeable. The semi-permeability is the property of membranes that gives them the ability to selectively allow the movement of particles/ solute/ solvent across it. The semi-permeability allows the cell to maintain a concentration gradient across its membrane that further drives various cellular processes within the cell.