Question

The following are called “suicidal bags”
A. Centrosome
B. Lysosomes
C. Microsomes
D. Mesosomes

Answer 1

Hint: The cell organelles that are termed as ‘suicidal bags’ are present freely in the cytoplasm. They are responsible for the intercellular and extracellular breakdown of substances as they contain hydrolytic enzymes. These organelles are bound by a membrane and are granular in nature.

Complete answer:
Lysosomes are the cell organelles that are referred to as suicidal bags. This is because lysosomes contain hydrolytic enzymes that digest cells and unwanted substances that enter the cell. They are involved in the breakdown of intercellular and extracellular substances. The enzymes present in lysosomes are:
> Proteases: help in protein digestion
> Lipases: help in lipid digestion
> Amylases: help in the digestion of carbohydrates
> Nucleases: help in digesting nucleic acids
> Phosphoric acid monoesters
When the lysosomes burst, the enzymes spill out into the entire cell, causing the cell membrane and wall to rupture. This eventually leads to cell death.

The correct answer is option ( B ) that is Lysosomes.

Additional information:
Let us discuss some of the other cell organelles:
Centrosome:This is an organelle that aids in cell division by organizing and regulating the microtubules. They also help in maintaining the number of chromosomes during cell division.
Microsomes: These are vesicle-like structures that are formed from the endoplasmic reticulum. They are not present in healthy cells.
Mesosomes: These are bacterial organelles that are formed by the extension of the plasma membrane into the cell wall. They help in cell wall synthesis and DNA replication

Note:
Lysosomes are of 2 types:
> Primary lysosomes, that are synthesized by the rough endoplasmic reticulum. They are sac-like structures that store enzyme-containing granules.
> Secondary lysosomes, that are formed by the fusion of phagocytes with primary lysosomes.