The ozonosphere is another term for the ozone layer, which is within the Earth's stratosphere. The ozone layer is responsible for absorbing most of the sun's ultraviolet (UV) radiation, thanks to its high concentration of ozone that is exclusive to this layer.
Do you have a picture? It would really help answer your question
Answer:
You need Light for Chlorophyll activation
So I guess its The Light Absorbing Pigment.
The enzyme catalyzes (speeds up) the rate at which the substrate is broken down.
