Question

Which organelle is most likely to take up oxygen and give off carbon dioxide?

Answer 1

Hint: The chloroplasts and mitochondria are the only two organelles which take and exert oxygen and carbon dioxide making them the primary cellular respiration organelles. Cellular respiration is as important as photosynthesis. Both have their own way of working in the plant body and help in survival.

Complete answer-
Chloroplasts are the organelle which likely take up oxygen and carbon dioxide. Along with mitochondria which has an inner membrane permeable to oxygen, water and carbon-dioxide Which allows the cells to function properly. Most of the C4 plants have special leaf anatomy called Kranz anatomy.
Chloroplasts have vascular bundles which are guarded by two rings of cells, containing starch-rich chloroplasts which lack granules inside them and differ from those in mesophyll cells present as the outer ring. As we discussed that chloroplasts are required for photosynthesis mechanisms besides providing pigment to plants, now let us see how the machinery of photosynthesis works.
Photosynthesis is the process of creating oxygen for the plants. Q cycle is the sequential oxidation and reduction of plastoquinone in the electron transport chain occurring in the thylakoid membrane. The Q cycle elaborates a series of reactions to describe how the oxidation and reduction in plants takes place. It occurs in two forms- ubiquinol and ubiquinone forms.

Note:
Examples of C4 plants include- sugarcane, maize, sorghum. The chloroplast without grana is called bundle sheath chloroplasts which are inactive in hill reaction, whereas grana bundle sheath and grana mesophyll chloroplasts show normal photosystem II.