Lysosomes arise from:

State the reason for the following:
$(i)$ Mitochondria are known as the powerhouse of the cell.
$(ii)$ Plastids are able to make their own protein.
$(iii)$ Plant cells shrink when kept in a hypertonic solution.

Why are mitochondria referred to as 'strange organelles'?

State whether the following statement is true or false:
The nucleus plays a central role in cellular reproduction.

Name an organelle which maintains the turgidity and rigidity of mature plant cells.

Which of these options are not a function of Ribosomes?
$(i)$ It helps in the manufacture of protein molecules.
$(ii)$ It helps in the manufacture of enzymes.
$(iii)$ It helps in the manufacture of hormones.
$(iv)$ It helps in the manufacture of starch molecules.