Question

The ‘Mastermind’ of the cell is
A. Protoplast
B. Nucleolus
C. Nucleus
D. Plastid

Answer 1

All the organelles present in a cell have various functions to perform. The mastermind of the cell designates the function to different organelles and it is dependent upon the synthesis of the proteins inside the cell. We can also find out the role of given organelles to find out who controls the protein synthesis.

Complete answer:
If we see the options given to us and try to identify the organelles from them, then we will see that protoplast is present there and it is not a cell organelle rather it is a modification of the cell. Protoplast is the cellular structure of a cell whose cell wall has been removed. So, in any case protoplast can never be the desired answer to the question. As it is not the part of the cell.
Now if we see the nucleolus, it is situated very deep inside the nucleus and the main function of the nucleolus is the ribosomes assembly and helps the cell in sensing the stress levels in the outside environment. If we discuss further about nucleolus then there are no further functions which are performed by the cell.
The word mastermind of the cell indicates that this organelle should be the brains of the cell which guides the cell to do whatever function is required. The functioning of the different parts of the cell is completely dependent upon the way the part is developed and whatever its genetic assembly is. The genetic assembly will lead to the expression of the DNA and protein synthesis which plays a major role in regulating the function of a cell part. As we have discussed this much, then we know that the DNA is stored and assembled inside the nucleus so, nucleus maybe the mastermind of the cell but let’s see the last option first.
Plastids are responsible for storing and manufacturing different things required by the cell. Thus, we can say that only the nucleus is the mastermind of the cell regulating the functions of all the different organelles of the cell.

The correct option is C, Nucleus.

Note: The plastids modify themselves into three different types depending upon the need of the plant. It can transform into chloroplast which is responsible for helping in photosynthesis. Chromoplasts contain pigments which give different colors to the plant parts and the last leucoplast which are responsible for storing proteins and fat components of the cell.