<P> In the eukaryotic cell , the cytosol is within the cell membrane and is part of the cytoplasm , which also comprises the mitochondria , plastids , and other organelles ( but not their internal fluids and structures ) ; the cell nucleus is separate . The cytosol is thus a liquid matrix around the organelles . In prokaryotes , most of the chemical reactions of metabolism take place in the cytosol , while a few take place in membranes or in the periplasmic space . In eukaryotes , while many metabolic pathways still occur in the cytosol , others are contained within organelles . </P>
<P> In the eukaryotic cell , the cytosol is within the cell membrane and is part of the cytoplasm , which also comprises the mitochondria , plastids , and other organelles ( but not their internal fluids and structures ) ; the cell nucleus is separate . The cytosol is thus a liquid matrix around the organelles . In prokaryotes , most of the chemical reactions of metabolism take place in the cytosol , while a few take place in membranes or in the periplasmic space . In eukaryotes , while many metabolic pathways still occur in the cytosol , others are contained within organelles . </P>
where does the most metabolic activity in the cell occur
where does the most metabolic activity in the cell occur
cytosol
cytosol