Question

Name one structure that is an organelle within an organelle?

Answer 1

Ribosomes:

1. All live cells contain ribosomes, which are little, dense, sub-microscopic, granular ribonucleoprotein organelles without a membrane.
2. Except for mammalian erythrocytes, all live cells include ribosomes (red blood corpuscles).
3. Organelle ribosomes (70S type) and cytoplasmic ribosomes are the two types of ribosomes, depending on where they are found (80S type in the eukaryotic cell).
4. In the cytoplasmic matrix, cytoplasmic ribosomes (cyto ribosomes) can remain free.
5. SRP protein or a particular ribophorin can also be used to bind them to the cytosolic surface of the endoplasmic reticulum.
6. Organelle ribosomes are found in mitochondria (mitoribosomes) and plastids (plasti ribosomes).