They also move plasma membrane during cell division. Intermediate filaments provide important structural support and anchoring in the cytoskeleton. These tubules and filaments do not occur in prokaryotes. Prokaryotes can move due to flagella which differ in chemical makeup from those of eukaryotes. Metabolic reactions occur everywhere in the cell, but those most central to the flow of energy are localized to the cytoplasm.
Reactions involved in initial breakdown of energy-rich nutrients occur in the cytosol .
In eukaryotes, this occurs in mitochondria . Mitochondria Mitochondria are as large as typical bacteria and are enclosed by two membranes. The inner membrane is folded into cristae that project into the matrix of the mitochondria. Within the matrix, there is also DNA and ribosomes similar to those found in bacteria. Bacteria do not have mitochondria.