Name the longest cell of the human body.

$(a)$ What is $DNA$? Where is it found?
$(b)$ Name the functional segment of $DNA$.

How do substances like $CO_2$ and water move in and out of the cell? Discuss.

The undefined nuclear region of prokaryotes is also known as:

Ram's teacher was showing the structure of a cell under a compound microscope,highlighting different parts like the cell wall,cell membrane,and nucleus. The teacher explained the difference between plant and animal cells,noting that the cell wall is found only in plant cells. Everyone observed the structure carefully and understood its structural importance.
$(a)$ What kind of qualities are shown by Ram?
$(b)$ Why is the cell called the structural and functional unit of life?

How is a bacterial cell different from an onion peel cell?