Video encyclopedia



The Structure & Function of Lysosomes - A Level Biology


Intracellular Organelles- The Lysosome


Lysosomes and peroxisomes | Cells | MCAT | Khan Academy


Animal Cell : Why are lysosomes called suicide bags?


Lysosomal storage disorders - animated quick review

A lysosome is a membrane-bound organelle found in nearly all animal cells. They are spherical vesicles that contain hydrolytic enzymes that can break down many kinds of biomolecules. Put simply, a lysosome is a type of vesicle with specific composition, of both its membrane proteins, and proteins of its lumen. The lumen's pH (4.5–5.0) is optimal for the enzymes involved in hydrolysis, analogous to the activity of the stomach. Besides degradation of polymers, the lysosome is involved in various cell processes, including secretion, plasma membrane repair, cell signaling, and energy metabolism.
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