biology questions?

Question

where in the chloroplast is the chlorophyll located?

Answer 1

These reactions take place in the thylakoid membranes. They involve 2 sets of light -absorbing reactions and 2 sets of electron transport chain reactions.

STEP 1. Light hits Photosystem II (P 680) causing electrons to be boosted to a higher energy level and pass into an electron transport chain. As a result some of the H+ from the stroma are carried through the thylakoid membrane and released into the space inside. ATP is produced here.


STEP 2: at the end of the chain a low energy electron enters Photosystem I
( P- 700). Here it gets energized by more sunlight. This energizes the electrons and moves them into the NADPH electron chain. This chain passes electrons to
NADP+ in the stroma. Each NADP+ accepts 2 electrons and reacts with a H+
in the stroma to form NADPH. The result is to move the electrons out of the thylakoid into the stroma. These electrons are replaced by the splitting of water, that also produces H+ and O2. The H+ stays in the thylakoid and becomes part of the H+ reservoir that will power the chemiosmotic synthesis of ATP.

Answer 2

In the membranes of the disks called thylakoids.