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Sameer Biology
Jahabarali


Unit 4 Photosynthesis






Photosynthesis is the process whereby light energy from the Sun is transformed into chemical
energy and used to synthesise large organic molecules (glucose) from inorganic substances (CO2 +
H2O). Photosynthesis forms the basis of most food chains.

Plants and animals depend upon the products…

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Sameer Biology
Jahabarali


Unit 4 Photosynthesis





The grana are connected with the interregnal lamellae
Loop DNA and ribosomes
o Can assemble proteins needed for photosynthesis

Photosynthetic pigments are molecules that absorb light energy of a range of
wavelengths, in the visible region with its own distinct peak of absorption. It…

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Sameer Biology
Jahabarali


Unit 4 Photosynthesis







Light In-dependant stage is the Calvin cycle which takes place in the Stroma, it uses Carbon dioxide and the
products of the light dependant stage to produce TP (triose phosphate), which can be used to produce
glucose.

The rubisco enzyme catalyses carbon fixation of…

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Sameer Biology
Jahabarali


Unit 4 Photosynthesis




o Some are used to make amino acids
o Some are used to fatty acids
Most GP is reduced and phosphorylated to form TP (triose phosphate- 3C), using ATP and oxidising
NADPH (from Light dependant reactions):
o Most(5/6) of TP are recycled by phosphorylation,…

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