Page 185 - Photosynthesis: The Green Miracle

Harun Yahya

b. c.
Photosystem II Photosystem II
H +
H +

P680 P680
Light-collecting
receptors
Reaction
center
Lumen
Lumen H + + 1/2 O H + H + H +
H 2 O H + 2 H 2 O H + + 1/2 O 2
H +
H +
B) The electron set in motion by the light is expelled from the P680. This
electron is replaced by an electron obtained from the breaking down of a water mole-
cule.
C) The electron set into motion passes to a carrier known as PQ that will transport
it to the cell complex.

d. Basic tissue e.
Photosystem I

NADP +

H +
NADPH

P700 P700

NADP enzyme catalyz-
ing biochemical reduc-
PC ing reaction
Lumen Lumen

D) After reaching the cell complex, the electron is transferred to PC, another trans-
porter. It then replaces the electron that was given up by P700 and set in motion by
the light.
E) The P700 electron passes to the NAPD complex. This is where two electrons in
P700, and two protons in the basic tissue convert NAPD+ into NAPDH.

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