BIOMOLECULES AND ENZYMES

Detailed explanation-1: -In cell biology, phagocytosis is the process by which a cell, often a phagocyte or a protist, engulfs a solid particle to form an internal vesicle known as a phagosome.

Detailed explanation-2: -Phagocytosis is a fascinating process whereby a cell surrounds and engulfs particles such as bacteria and dead cells. This is crucial both for single-cell organisms (as a way of acquiring nutrients) and as part of the immune system (to destroy foreign invaders).

Detailed explanation-3: -Phagocytosis. During phagocytosis, cells engulf large particles such as bacteria, cell debris, or even intact cells (Figure 12.34). Binding of the particle to receptors on the surface of the phagocytic cell triggers the extension of pseudopodia-an actin-based movement of the cell surface, discussed in Chapter 11.

Detailed explanation-4: -Phagocytosis (literally, “cell eating”) is a form of endocytosis in which large particles, such as cells or cellular debris, are transported into the cell.

Detailed explanation-5: -Endocytosis takes particles into the cell that are too large to passively cross the cell membrane. Phagocytosis is the taking in of large food particles, while pinocytosis takes in liquid particles. Receptor-mediated endocytosis uses special receptor proteins to help carry large particles across the cell membrane.