Question

Name three structures which are present in all eukaryotic cells, but absent in RBCs.

Answer 1

Eukaryotic cells:

1. The cells that have a well-defined membrane-bound nucleus are called eukaryotic cells.
2. Cell organelles or structures found in eukaryotic cells are nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosome, vacuoles, etc.

RBC:

• The red blood cells (RBCs), also called erythrocytes are the type of cells that are present most abundant in the blood.
• In mammals, when RBCs mature, they become enucleated to increase the oxygen-carrying capacity.
• Also, they lack mitochondria and endoplasmic reticulum.
• This increases their flexibility while circulating and prevents the usage of oxygen by themselves.

The three structures which are present in all eukaryotic cells, but absent in RBCs are the nucleus, mitochondria, and endoplasmic reticulum.