Homework Help: Biology

Posted by Sara on Monday, February 19, 2007 at 3:42pm.

Which materials produce during the light reactions of photosynthesis are essential to the dark reactions?

Light Reactions (Occurs in Grana)

The purpose of the light reactions is to change light energy into chemical energy of ATP and NADPH.

a) Require light

b) Light makes excited electrons leave the chlorophyll. The electrons pass their energy to make ATP.

c) The light splits water to make hydrogen ions (H+) and oxygen.

d) The oxygen is released to the air.

e) The H+ and more excited electrons are used to make NADPH (an energy & H+ carrier).

ATP carries energy to the dark reactions.

Source:
http://ghs.gresham.k12.or.us/science/ps/sci/soph/energy/intbio/photo/rxns.htm

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