The first steps of catabolism generally take place in the cytosol.
Glycolysis and pentose phosphate pathway are metabolic process that occurs inside of the cytosol. Other catabolic processes such as the citric acid cycle, electron transport chain, and oxidative phosphorylation all take place in the mitochondrial membrane.
Well, usually the qn would be what is different between a compound and a molecule. but if you ask like this then, here goes.
An element is the simplest substance that can not be broken down into its components using physical processes. exp: Na, S, K
A molecule is a substance that make up of an element bonded together.
exp: O2, S2, F2(diatomic molecules)
