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PHOTOSYNTHESIS - Coggle Diagram
PHOTOSYNTHESIS
Autotrophs
produce their own food
(glucose)
stoma - pores
mesophyll cells
Chloroplast
stroma = fluid-filled interior
grana
- thylakoids are connected in stacks called grana
Thylakoid
system of interconnected membranous sacs
Stages of photosyntesis
Light reaction- light dependent stage 1
Occurs in the grana of the
chloroplast
Capture of light energy
light energy excites electrons in photosystem II, causing water molecule to split
Releases electron into electron transport
system, H+
O2 produced as waste
Calvin Cycle - light - independent stage 2
:check: chloroplast stroma
:check: need products of light reactions to drive
synthesis reactions
:star: ATP
:star: NADPH
Light Independent or Dark
Reactions
Use ATP and NADPH made in Light Reaction to produce glucose
Redox reaction
Photosynthesis is an oxidation-reduction reaction
Oxidation = loss of electrons
Reduction = gain of electrons
Electrons travel with a Hydrogen Ion (H+ + e-)
To G3P and Beyond!
▪ Glyceraldehyde-3-P
end product of Calvin cycle
energy rich 3 carbon sugar
“C3 photosynthesis”
G3P is an important intermediate
▪ G3P → → glucose → → carbohydrates
→ → lipids → → phospholipids, fats, waxes
→ → amino acids → → proteins
→ → nucleic acids → → DNA, RNA
RuBisCo
Enzyme which fixes carbon from air
ribulose bisphosphate carboxylase
◆ the most important enzyme in the world!
it makes life out of air!
◆ definitely the most abundant enzyme
