Answer:
Photosystems is a process in which solar energy is converted into chemical which occurs in protein complex. There are two photosystems i. e. photosystem l and photosystem ll. Photosystem occurs outside surface of thylakoid membrane of chloroplast. In photosystem l, solar energy is converted into ATP and NADPH. Photosystem occurs inside surface of thylakoid membrane of chloroplast. In photosystem ll, hydrogen is extracted from water molecule which is used in the formation of ATP by using ATP synthase enzyme.
For a reaction to occur, substrate particles need to collide with each other with enough force (To overcome activation energy), at the right orientation for a successful collision, causing a reaction to occur.
Enzyme catalysts are a type of protein that has a specific 3 dimensional conformation. They have specific reaction sites called active sites. Substrates collides with the enzyme and binds to the active site if it fits to the specific 3 dimensional conformation. This allows bonds to be either formed or broken for reactions to occur.
This process provides an alternative reaction pathway with lower activation energy to enable the rate of reaction to increase.
Rb
H i d
U Mk
H
ねや、
なな
なゆあ、みねまなユア、嶺まな
♏️
oxygen
carbon dioxide
water
protection from uv rays