Question

The smallest cell organelle is
A) Lysosome
B) Dictyosome
C) Polysome
D) Ribosome

Answer 1

By microscopy, organelles are characterized and can also be separated by fractionation of cells. Multiple types of organelles exist, especially in eukaryotic cells.

Complete answer:
First we should know about organelle to answer this question. An organelle is a specialised subunit in cell biology, typically inside a cell, which has a particular function. Organelles are either individually embedded within their own bilayer of lipids (also named membrane-bound organelles) or are functional units spatially distinct without a bilayer of lipids covering them.
Now, let us find the solution from the options-
- In certain animal cells, a lysosome is often a membrane-bound organelle that is located. The proportions of the organelles differ substantially, and the larger ones may be more than 10 times the size of the tiny ones. Thus, option A is not the correct option.
- Dictyosomes, which form the Golgi apparatus, are net-like broad, membrane-bound cavity structures known as cisternae. For more transport, proteins are deposited in dictyosomes, updated, sorted, and loaded into vesicles. Thus, option B is not the correct option.
- A polysome is a collection of ribosomes attached like "beads" on a "string" to an mRNA molecule. It comprises an mRNA molecule complex and two or even more ribosomes serving to convert instructions from mRNA into polypeptides. Thus, option C is not the correct option.
- The ribosome seems to be the smallest organelle. The ribosome’s diameter is around 20 nm. It is the location of protein production within the cell.

Thus, the correct answer is option (D) Ribosome.

Note: In the order defined by the codons of messenger RNA molecules, ribosomes bind amino acids together to construct polypeptide chains. Two primary components are made up of ribosomes: the large and small ribosomal subunits.