Which is incorrect with reference to chloroplast?

Step-by-step solution

Option (3) is incorrect about chloroplasts. They are spherical, ovoid or disc-shaped cell organelles. These are found in plants and algae. They are involved in photosynthesis due to the presence of chlorophyll in them. During photosynthesis, O ₂ is released. They are not associated with any type of respiration, i.e. aerobic and anaerobic and can be found in any type of cell.