Which of the following can be crystallized?

$(a)$ Name the organelle which provides turgidity and rigidity to the plant cell. Name any two substances which are present in it.
$(b)$ How are they useful in unicellular organisms?

Find out the correct sentence.

What will happen if
$(a)$ ribosomes are removed from the cell,
$(b)$ Golgi apparatus is removed from the cell,and
$(c)$ plasma membrane ruptures?

Who discovered the Golgi apparatus? Describe its structure and functions.

Name the largest known cell.