Why do unripe oranges turn from green to orange upon ripening?

Unripe oranges contain chloroplasts with chlorophyll (green). During ripening, chloroplasts convert into chromoplasts, which contain carotenoids (orange pigments) Related Questions: Why are mitochondria known as the powerhouse of the cell? What makes red blood cells more suitable for the transport of oxygen? Keeping in view the parts labeled 1 to 4 in the plant cell … Read more