Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to?

The green colour is due to the presence of chlorophyll pigment.

[Extra information:

Chlorophyll is the green-coloured pigment found in plants, algae, and cyanobacteria. It is found in the thylakoid membranes inside the chloroplast. Chlorophyll is an important pigment for the process of photosynthesis. It absorbs light to provide energy for photosynthesis to occur.]