An autonomic genome system is present in

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

$ATP$ synthesis occurs on the

Assertion : Mitochondria and chloroplasts are semi-autonomous organelles.
Reason : They are formed by division of preexisting organelles as well as contain $DNA$ but lack protein-synthesizing machinery.

Organelles which are regarded as the $Power house$ of the cell and in which the oxidative reactions of the respiratory process take place are

Cellular respiration is carried out by