(i) Name any two cell organelles which are bounded by double membranes.
(ii) Why are mitochondria called semiautonomous organelles ?
(iii) Where one would find green chlorophyll pigment in a plant cell ?

Explanation

(i) Mitochondria and plastids.
(ii) Mitochondria are capable of self duplication. They are also able to synthesize some of their own proteins. Hence, they are regarded as semiautionomous organelles.
(iii) Chlorophyll pigments are found in thylakoids of chloroplasts in plant cell.