Autotrophic organisms make organic
compounds from Carbon Dioxide.
They rely on Photosynthesis.
Light Dependent Reaction
Electron
Transport Chain
Makes ATP.
Aims: 1) Produce ATP.
2) Photolysis of Water
1. A photon of light
hits a chlorophyll
molecule. Energy is
transferred to the
electrons.
2. Electrons excited: Raised to higher energy level
3.Leaves Chlorophyll molecule immediately
4. Picked up by an electron
carrier/acceptor. Through a series of
redox reactions and moving down
acceptors at different energy levels,
energy is then released to help form
ADP+Pi--->ATP
5.NADP then picks up the electron, becoming reduced NADP
Reduced NADP
6. The Chlorophyll now needs to
be restocked of electrons, so
photolysis of water occurs.
Photolysis
4OH- - 4e- (lost to chlorophyll) ---> O2 + 2H2O
Oxygen
ATP
Occurs in Thylakoid
Light Independent Reaction
Calvin Cycle
Occurs in the Stroma
6CO2+6H20---->C6H12O2+6O2
Needed for life
Consisting of an Adenine base, ribose
sugar and triphosphate. Each bond
between the phosphates is broken to
release energy through a hydrolysis
reaction. This is catalysed by ATPase. ADP
is then formed and a free inorganic
phosphate. It is a reversible reaction.