Which of the following organelles contains a system of folded membranes?

Read the statements $P$ and $Q$:
$P$: The number of mitochondria in each cell does not depend on the physiological activity of the cell.
$Q$: Mitochondria are present in both plant and animal cells.
Select the correct option from the given choices.

Which of the following is a self-replicating organelle?

Which of the following observations most strongly supports the view that mitochondria contain electron transfer enzymes aggregated into compact associations?

What are the infoldings of the inner membrane of the mitochondria called?

The prokaryotic origin of mitochondria was proposed by