Page 67 - The Manga Guide to Biochemistry
P. 67

Well, as you probably know,
everything around us is made
up of atoms. Every atom has a

    center called a nucleus... and a group
                                                      of electrons

                                                  revolving around
                                                       this nucleus.

      When sunlight           I'll explain it                                                       Yikes!
strikes chlorophyll,             in detail!!
                                                                              When this happens,
    the molecule is   Electron                                             one of the electrons
    "excited" by the                                                       in the molecule ends

       light energy.                                                              up flying off.*

Light

       Nucleus

* Actually, Electrons fly off only from the central reaction center chlorophyll. The other chlorophyll
   molecules act as amplifiers to feed energy into the reaction center, which enables the electrons to detach.

              The free electron                                                  Ah! I get it now!  Yeah!
            is then delivered to                                         Since the electrons are
       another protein complex                                          passed along to another
          near the chlorophyll.                                           complex, it's called an
                                                                      "electron transport chain!"
 This other protein complex is also
embedded in the thylakoid membrane.

               Remember the                                           Oh!      So a plant
        collection of weird                                                 can't perform
                                                                           photosynthesis
             shapes earlier?
                                                                              if it doesn't
              That electron is                                                have water.
       replenished by breaking
       down water molecules,

            and O2 is produced
                   as a result.
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