Which part of the cell is called the brain of the cell?

Draw a plant cell and label the parts which:
$(a)$ determines the function and development of the cell
$(b)$ packages materials coming from the endoplasmic reticulum
$(c)$ provides structural strength to the cell to withstand hypotonic external media without bursting
$(d)$ is the site for many biochemical reactions necessary to sustain life
$(e)$ is a fluid contained inside the nucleus

Identify a cell organelle which is present in prokaryotes as well as eukaryotes. Discuss their shape and location.

What is the name given to:
$(a)$ components of the cell?
$(b)$ energy currency of the cell?

Describe the structure of mitochondria with special reference to its membrane covering.

How does Amoeba obtain its food?