Question

Nissl granules are formed from
(a)RER
(b)SER
(c)DNA
(d)Golgi bodies

Answer 1

Hint: It represents the protein-synthetic machinery of the cell. It is composed of electron-dense particles and that these occur either in free form among the membrane structures. The staining technique is helpful to restrict the cell body, as it very well may be found in the soma and dendrites of neurons, however not in the axon or axon hillock.

Complete answer
Nissl granules are also called the tigroid body, a condensed portion of the cytoplasm of a nerve cell. Nissl bodies were first described at the top of the 19th century by the German scientist F. Nissl.
In our body the large granular mass is present in the nerve cell or neurons, so it is called Nissl granules. They are also called Nissl substance or Nissl body or Nissl materials which are stained with basic dyes.
It is formed by a rough endoplasmic reticulum (RER) having rosettes of free ribosomes (polyribosomes) which are involved in the formation of protein synthesis.

Additional information:
Nissl bodies show changes under different physiological conditions and in neurotic conditions like axonotmesis they'll disintegrate and vanish (chromatolysis) with an end goal to upregulate protein blend for axonal fix furthermore, Nissl bodies would return after an effective repair. Chromatolysis means the disappearance of Nissl bodies.

So the correct answer to the above question is ‘RER’.

Note: Nissl bodies (chromatin granules), strongly basophilic and stained by cresyl violet and comparable colors, involve the perikaryon and dendrites however not the axon hillock. They are more noticeable in the engine than in tactile neurons, sums shifting with cell movement.
Changes inside the synthetic structure, shape, and checking attributes of Nissl bodies happen because of injury to the systema nervosum, fiery or irresistible illnesses, harming oxygen hardship, or movements in the capacity of the neurons.