Chromosomes are made up of

The cell wall of which of these is not made up of cellulose?

If you are provided with some vegetables to cook,you generally add salt into the vegetables during the cooking process. After adding salt,vegetables release water. What mechanism is responsible for this?

Which organelle,other than the nucleus,contains $DNA$?

Find out the false sentences from the following:
$I$. Golgi apparatus is involved with the formation of lysosomes.
$II$. Nucleus,mitochondria and plastid have $DNA$; hence they are able to make their own structural proteins.
$III$. Mitochondria is said to be the power house of the cell as $ATP$ is generated in them.
$IV$. Cytoplasm is called as protoplasm.

Name the longest cell of the human body.