Question

Ribosome is often called
A. Microsome
B. RNA particles
C. Dictyosomes
D. Oxysome

Answer 1

Hint: Ribosomes help in protein synthesis. They are granular structures that were first observed under electron microscope as dense particles by George Palade in the year 1953. They are found in all kinds of cells that mean they can be easily found in prokaryotic cells as well as in eukaryotic cells.

Complete answer:
Ribosomes are the small particles that are found in the cytoplasm of cells and they are found attached to the endoplasmic reticulum. Endoplasmic reticulums are of two types: rough and smooth. Rough endoplasmic reticulum has ribosomes on its surface.
They are also known as the “protein factory” of the cell that means they are very much helpful in the generation of proteins in the cell. They have RNA and proteins in them which will help in the making of proteins.
There are three types of ribosomes that are found – rRNA, mRNA, and tRNA. rRNA is ribosomal RNA. mRNA is messenger RNA and tRNA is transfer RNA. They all perform different functions and all are very much important.
Ribosomes are made up of ribosomal units which combine together and form the ribosome. One unit is called a large unit and one unit is called a small unit.

Therefore, the correct answer is option (b).

Note:
in prokaryotic cells, 70S ribosomes are present whose subunits are 50S and 30S. And in eukaryotic cell, 80S ribosomes are present which is made up of two subunits, 60S and 40S. Organelles like mitochondria and chloroplast, they have their own DNA and due to this reason they need separate ribosomes for the process of protein synthesis.