What is the full form of $RNA$ and $DNA$?

If the organization of a cell is destroyed due to some physical or chemical influence,what will happen?

$1 \, \mu m$ is equal to:

Which of the following can be crystallized?

Ria was studying about $DNA$ in her textbook,learning that $DNA$ molecules are responsible for constructing and organizing cells and are present as part of chromatin material in the nucleus to transfer hereditary information. Ria was confused about how she could know if she possesses all the hereditary information from her parents. Her mother explained that through their hair or cells,the $DNA$ of parents and a child can be matched.
$(a)$ What kind of qualities are shown by Ria's mother?
$(b)$ In which part of a cell is $DNA$ found? State its function.

When a living plant cell loses water through osmosis,there is contraction of the contents of the cell away from the cell wall. What is this phenomenon called?