a What holds the ribosomes together in a polysome? Why lysosomes are called suicide bags? How and where lysosomes are formed in the cell?
Answers
Answer:
A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria by hydrolytic enzymes.
Lysosomes are formed by the combined activity of the Endoplasmic reticulum and Golgi apparatus. The rough endoplasmic reticulum synthesis the precursors of hydrolytic enzymes. The precursors are transferred to Golgi apparatus. After reaching the golgi apparatus, precursors are changed to active hydrolytic enzymes. Golgi apparatus pack these enzymes in larger vesicles by budding. These vesicles are then combined with endosomes. Endosomes are formed by endocytosis, a section of the plasma membrane is internalized by the cell. These endosomes mature and then fuse with vesicles from the Golgi that contain hydrolytic enzymes. After fusing, these endosomes eventually develop into lysosomes.
As we can see, in this process, the main function done by Golgi apparatus is packing of vesicles. So, we can say A lysosome is a membrane-bounded vesicular structure formed by the process of packaging in the Golgi apparatus.