Cell Biology

Step 1: Understand the term "suicidal bags".
This term refers to a cell organelle that contains digestive enzymes and can break down waste materials, cellular debris, or even the cell itself under certain conditions (autolysis).

Step 2: Evaluate the functions of the given organelles.
Option (1) Plastids: Organelles found in plant cells and algae, involved in photosynthesis (chloroplasts), storage of starch (amyloplasts), or synthesis and storage of pigments (chromoplasts).
Not known as suicidal bags.
Option (2) Lysosomes: Membrane-bound organelles containing a variety of hydrolytic enzymes (e.
g.
, proteases, lipases, nucleases, carbohydrases) that break down waste materials, cellular debris, and foreign matter engulfed by the cell (e.
g.
, bacteria).
If a cell is damaged or old, lysosomes can release their enzymes to digest the entire cell, a process called autolysis.
This function earns them the nickname "suicidal bags" or "digestive system of the cell.
" Option (3) Vacuoles: Membrane-bound sacs within the cytoplasm.
In plant cells, a large central vacuole helps maintain turgor pressure and stores water, nutrients, and waste products.
In animal cells, vacuoles are generally small and temporary.
Not primarily known as suicidal bags, though they can be involved in waste processing.
Option (4) Mitochondria: Organelles responsible for cellular respiration and ATP production ("powerhouses of the cell").
Not known as suicidal bags, though they play a role in apoptosis (programmed cell death), which is different from the lytic "suicidal bag" concept.

Step 3: Identify the correct organelle.
Lysosomes are known as the "suicidal bags" of the cell due to their role in autolysis.
This matches option (2).