Question

Which one of the following cell organelle is considered as ‘Cell within a cell’?

Options

• Ribosome

• Golgi complex

• Centriole

• Mitochondria

Answer 1

Mitochondria

Explanation:

In a eukaryotic cell, mitochondria and chloroplasts are unique cell organelles. Both have a double membrane, contain DNA, and have ribosomes and protein synthesis machinery of their own. They are self-contained entities. These organelles' ribosomes resemble bacterial ribosomes. These traits are viewed as supporting evidence for the endosymbiotic idea. Endosymbiosis theory states that bacteria and blue-green algae endocytose each other, resulting in the formation of chloroplasts and mitochondria. Blue-green algae and bacteria, according to this notion, were not digested but instead became symbiotic. ‘A Cell within a Cell’ is a term that describes this concept.