Question

Nissl bodies are mainly composed of
A. Nucleic acids and SER
B. Proteins and lipids
C. Free ribosomes and RER
D. DNA and RNA

Answer 1

Hint: The Nissl bodies, also called the substance of Nissl, is a structure. This is inside the interior of the neurons. In unique, it's miles found in the nucleus of the cell (known as soma) and inside the dendrites. The axons or nerve extensions thru which neural alerts tour by no means lack Nissl our bodies.

Complete answer: The bodies of nissl are accumulations of the rough endoplasmic reticulum (RER). These are organelles that synthesize and switch proteins. They are placed subsequent to the envelope of the neuronal soma, connected to it with the objective of capturing the important records for a correct synthesis of proteins. It is vital to recognize that in a few physiological conditions and in certain pathologies nissl bodies can trade or even dissolve and disappear. An instance is chromatolysis. Its structure is a set of stacked membranes. It is known as"difficult" through its appearance, as it additionally has a big quantity of ribosomes arranged in a spiral on its surface. The bodies of nissl serve, mainly, to synthesize and to release proteins. These are essential for neuronal growth and regeneration of axons inside the peripheral worried machine. Ribosomes are clusters of proteins and ribonucleic acid (RNA) that synthesize proteins from the genetic statistics they receive from DNA via messenger RNA.
Structurally, the bodies of Nissl are shaped by using a sequence of cisterns that can be allotted all through the cellular cytoplasm.
Hence, the correct option is C, i.e., Free ribosomes and RER

Note: Nissl bodies are defined as basophilic accumulations located inside the cytoplasm of neurons composed of hard endoplasmic reticulum and ribosomes. Its name comes from the psychiatrist and German neurologist Franz Nissl (1860-1919). Our bodies of Nissl can be determined very without problems in the optical microscope, for the reason that they may be stained selectively by their content of RNA.