Question

which photosynthetic pigment exists in the parts of the coleus leaf where starch is detected? before pigment removed after pigment removed anthocyanin biuret chlorophyll melanin

Explanation:

Chlorophyll is the key pigment in photosynthesis. It captures light energy and is essential for the process that produces starch (a product of photosynthesis). Anthocyanin is a pigment for color (like red in some plants, not for photosynthesis). Biuret is a chemical reagent (not a plant pigment). Melanin is an animal pigment (not in plants for photosynthesis).

Answer:

Chlorophyll