Question

Which one of the following types of cells lacks a nucleus in Humans?
A. RBC
B. Neutrophils
C. Eosinophils
D. None

Answer 1

Hint: The human body consists of thousands of variant types of cells. Almost every cell in the body consists of a nucleus. The nucleus is the maser organelle of the cell. It carries all the information required for the cell to function. The required energy for cells to live comes from the instructions given by the nucleus. Some cells lack a nucleus and thus have a shorter lifespan. They carry some other bigger molecules in place of the nucleus.

Complete answer: The nucleus consists of DNA as genetic material in the human cells. The DNA consists of genes that regulate various metabolic functions of the cells. The nucleus assists in the energy production mechanisms of cells that sustain the survival of cells. But some cells lack a nucleus. These cells act as carrier cells. As they have to carry some other important bio-molecules required by other cells they lack a nucleus and use that space to hold other things.
To know which of the above-given cells lack a nucleus, let us understand the characteristic features of each given cell.
-The RBCs or red blood cells function to carry oxygen from the lungs to all the other parts of the body. They are biconcave in shape due to the lack of any cell organelle including the nucleus. Due to this reason they survive for limited days and are made new every day. The nucleus is absent because they need to carry large hemoglobin molecules that further carry oxygen molecules.
-Neutrophils and Eosinophils are granulocyte cells of the immune system. They both have a nucleus in them that assists their fast function towards foreign infections.
So, the right answer is Option A, i.e., RBCs are the cells in the human body that lack the nucleus inside them.
Note: Red blood cells are the transport cells of the human body. They carry oxygen from one part of the body to the other. In their nascent state, they carry mitochondria and other important organelles. The energy required for their future role is provided in this stage only. After they enter their mature phase, the RBCs lose these organelles and become ready to carry hemoglobin molecules.