NEET BIOLOGY

Detailed explanation-1: -The nucleus in neurons is spherical and ranges in diameter from 3 to 18 micrometers depending on the size of the neuron. Neurons with long axons have a larger cell body and nucleus. As in other cells, the principal component of the nucleus is deoxyribonucleic acid (DNA), the substance of the chromosomes and genes.

Detailed explanation-2: -Neurons are often actively synthesizing lots of protein so they have an extensive network of rough endoplasmic reticulum (rough ER) and a large and prominent nucleolus (the organelle inside the nucleus where ribosomal RNA is made).

Detailed explanation-3: -In a neuron, the nucleus is responsible for cell function and regulation. The nucleus contains the DNA of the cell and produces ribosomes for production of protein. It’s the center of the neuron and contains organelles that help the cell work.

Detailed explanation-4: -Answer and Explanation: The correct answer is (d): all of the above. Neurons are excitable cells that have a cell body known as soma, and two different types of extensions called dendrites and axons. The soma contains the nucleus and most of the organelles.