One reason why a molecule may not be able to pass into or of the cell

All cells have selectively permeable membranes, which means that only they let certain important molecules inside the cell, while the others stay outside the cell.

This occurs by the process of diffusion or osmosis.  

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

< > arsenal < >