Which organelle is called the powerhouse of cell and why?

The mitochondria is called the powerhouse of the cell because it produces energy in the form of ATP (Adenosine Triphosphate). The mitochondria are small organelles found in most eukaryotic cells. They are responsible for generating the energy that the cell needs to function. This energy is created during a process called cellular respiration. 

In this process, mitochondria take in nutrients like glucose and oxygen and convert them into ATP, which is the energy currency of the cell.

ATP is used by the cell to carry out essential activities such as muscle contraction, nerve impulse transmission, and biochemical reactions. Without mitochondria, cells would not be able to produce enough energy to survive. That’s why they are often referred to as the “powerhouse of the cell”.

Mitochondria have their own DNA, which means they can reproduce independently of the rest of the cell. This unique feature suggests that they may have once been free-living organisms. In summary, mitochondria play a key role in maintaining life by converting food into usable energy, making them essential to almost all living organisms.