A lysosome (derived from the Greek words lysis, meaning "dissolution/ destruction", and soma, "body") is a membrane-bound cell organellefound in most animal cells. They are known to contain more than 50 different enzymes, which are all optimally active at an acidic environment of about pH 4.5
For this function they are popularly referred to as "suicide bags" or "suicide sacs" of the cell. hey were discovered and named by Belgian biologist Christian de Duve, who eventually received the Nobel Prize in Physiology or Medicine in 1974.
2 process in lysosomes
Autophagy
(or autophagocytosis) (from the Greek auto-, "self" and phagein, "to eat"), is the natural, destructive mechanism that disassembles, through a regulated process, unnecessary or dysfunctional cellular components. autophagy has been seen as an adaptive response to stress which promotes survival, whereas in other cases it appears to promote cell death and morbidity.
Crinophagy the intracytoplasmic digestion of the contents (peptides, proteins) of secretory vacuoles,after the vacuoles fuse with lysosomes.a process in which excessive amounts of hormone are fused with lysozymes to degrade the hormone.
Peroxisomes are small, membrane-enclosed organelles (Figure 10.24) that contain enzymes involved in a variety of metabolic reactions, including several aspects of energy metabolism.
A major function of the peroxisome is the breakdown of very long chain fatty acids through beta-oxidation. In animal cells, the long fatty acids are converted to medium chain fatty acids, which are subsequently shuttled to mitochondria where they are eventually broken down to carbon dioxide and water. In yeast and plant cells, this process is exclusive for the peroxisomes.
Peroxisomes contain oxidative enzymes, such as catalase, D-amino acid oxidase, and uric acid oxidase.

Catalase, another peroxisomal enzyme, uses this H2O2