You're on the phone with your girlfriend,
she's upset
She's going on about AP Bio she don't get
Cause she doesn't get photosynthesis like
I do
I'm in my room studying for a concept check
She's knows that she's probably gonna wreck
So you ask me to teach her what I know
Starts with the pigments capturing sunlight
Transferring energy into electrons of the
chlorophyll
They jump into the acceptor and move out of
PS II
But don't forget they split water to fill
the electron holes
And the electrons move to cytochrome-filled
ETC
Providing energy to create ATP
By pumping H ions into lumen
To create a proton motive force
Electrons move on to go to the PS I
To re-excite them in the same way the first
time
Then they go to ETC w/out cytochromes
Hey isn't this easy?
This time the electrons go to NADP+
To make NADPH, hey look, it's a redox
But some go back to make some more ATP
It's cyclic electron flow, can't you see?
We leave the thylakoid membrane to move on
to
Making sugar from molecules of CO2
This happens in the stroma of the chloroplast
It's called the Calvin Cycle, hope this is
not to fast
3 CO2 enter the first phase called fixation
Where they join with RuBP to create 6-Carbon
Molecules by the enzyme called rubisco
But the molecules break in half cause they're
unstable
They go to reduction so that they are able
to be phosphorylated and reduced by ATP
and NADPH respectively
All these molecules are now called G3P
Which are half of a glucose
While one will stay behind
The other 5 will go
To regeneration
In the cycle it's phase 3
They will be rearranged
into 3 RuBP
The cycle begins again with fixation
One more go around and it's all done
With 2 G3P, together making 1 full glucose
There you go, the process in a nutshell
Light and dark reactions, there's no more
to tell
But maybe just listen to Ulicny
Ms. Ulicny
Ms. Ulicny
Have you ever thought just maybe
To listen to Ulicny
Ms. Ulicny
