Cholesterol molecules, although less abundant than glycerophospholipids, account for about 20 percent of the lipids in animal cell plasma membranes. However, cholesterol is not present in ...

A plant cell wall is arranged in layers and contains cellulose microfibrils, hemicellulose, pectin, lignin, and soluble protein. These components are organized into three major layers: the primary ...

"Cell division, or cytokinesis, in plant and animal cells is different," said ... cells across fenestrae (small openings) and the plasma membrane molds around these tubules to form plasmodesmata ...