Question

When a lysosome fuses with a phagosome/food, it results in the formation of
(a)Secondary lysosome
(b)Primary lysosome
(c)Autophagic vacuole
(d)Residual body

Answer 1

Lysosomes are cell organelles with high enzymatic content and are found in a large number in the cells of the liver, kidneys, macrophages, pancreas, etc. The enzymes found in them are capable of breaking down various organic compounds including nucleic acids, lipids, and proteins.

Complete Answer:
Lysosomes are organelles bound to a membrane containing acid hydrolases or digestive enzymes or aging organelles, food particles, saturated bacteria or bacteria, and macromolecules. They can be found in animal cells and other plant cells (such as vacuoles) and are able to break down the different types of macromolecules brought into the cell to be released. Most of these macromolecules are damaged or complete their life cycle and are no longer active. A phagosome is known as a food that is engulfed inside the cell with the help of phagocytosis. Phagosome combines with the primary lysosome which contains inactive enzymes to form the secondary lysosome which has active enzymes to break down the food.

Additional information:
There are two main types, these include:
Primary/Basic lysosomes - made of Golgi materials that look like tiny tissues. These lysosomes are surrounded by a single layer of phospholipid and contain acid hydrolases. Eventually, most of the primary granules will combine with the phagosomes, leading to the formation of secondary lysosomes.
Secondary lysosomes - are formed when basic lysosomes interact with phagosomes/pinosomes (also called endosomes). This compound also activates previously inactive enzymes that can digest biomolecules such as nucleic acids and lipids among others.
Compared with basic lysosomes, the secondary is larger in size and can release its own content (enzymes) without cells where it scavenges foreign substances.

So, the correct option is “Secondary lysosome”

Note:
- In addition to Endocytosis, lysosomes are also involved in another process called autophagocytosis. This process contributes to the breakdown of various aging or malfunctioning cells.
-The autophagic (secondary) lysosomes release enzymes that digest various cell components as soon as the cell dies. This is also called autolysis.
-Autophagy also occurs during starvation. During times of famine, lysosomes will begin to produce organic hydrolyzing food stored in cells for energy production.