Ribosome cgi video. Ribosomes are minute particles consisting of RNA and associated proteins that function to synthesize proteins. The cell membrane surrounds all cells and it is semi-permeable, controlling the movement of substances in and out of cells. It contains a wide variety of biological molecules, primarily proteins and lipids, which are involved in a variety of cellular processes such as cell adhesion, ion channel conductance and cell signaling. The plasma membrane also serves as the attachment point for the intracellular cytoskeleton and, if present, the extracellular cell wall. Medical vfx experts Polymime. Royalty free stock 3d animations from mecial animation experts Polymime.