Page 71 - The Manga Guide to Biochemistry

Photosynthesis—carbon dioxide fixation

Photophosphorylation Carbon fixation

That's all for photo- Next, we’ll study O-okay!
phosphorylation. carbon fixation.
Just remember:
Sunlight is
always required!

The final steps of photo­ Then does carbon Actually, no. It just means
phosphorylation in which ATP dioxide fixation that light isn't needed at
and NADPH are synthesized will happen even at that particular station. The
occur even if light is no longer night or on a reaction itself occurs in
present. This is known as a light- cloudy day? the daytime because NADPH

independent reaction.* is required and is not
manufactured at night.

* This light-independent reaction is also known as the Calvin Cycle or the Reductive Pentose Phosphate Cycle.

Carbon dioxide fixation occurs in Stroma
the stroma, which is the central
part of the chloroplast, rather
than in the thylakoid membrane.

See? right
here.

Gotcha.