Which of the following cell organelles is responsible for generating $ATP$ by extracting energy from carbohydrates?

In which part of mitochondria is $ATP$ generated?

Mitochondria are usually found in

In the given figure, what is present in the part labeled $B$?

Give information about the structure,location,and function of mitochondria.

$P -$ Assertion: The inner membrane of the mitochondria forms a number of infoldings called cristae,which contain $F_1$ particles.
$Q -$ Reason: Cristae contain the components necessary for oxidative phosphorylation.