Page 176 - Photosynthesis: The Green Miracle

Chloroplast

Cytochrome bf
Photosystem II
Photosystem I
ATP synthesis

(a)

Chlorophyll receptors These molecules absorb
binding to protein light energy and transmit
Light Carotenes, other it between the molecules
assistant pigments until it reaches the reac-
tion center.

Reaction center

(b)

The organization of the components of the photosystem.
A) The distribution of Photosystem I and Photosystem II in the thylakoid membrane and ATP syn-
thesis are not haphazard. Photosystem I and ATP synthesis are left totally outside the tightly
stored regions. Nonetheless, since Photosystem II is tightly stored, it is found in abundance in
this region. The division between Photosystems I and II in this way prevents the energy ab-
sorbed by Photosystem II being transmitted directly to Photosystem I.
B) The reaction center is shown in a magnification of a photosystem showing chlorophyll re-
ceptors and assistant pigments. All these systems, with their extraordinary features, are
packed into an area as small as a plant cell. This detailed and flawless design is one of the
proofs of Allah’s creation.