Photosynthesis

?

Photosynthesis

CO2+H2O--> Carbs + O2

6Co2+12H2O+Light energy--> C6H12O6+6O2+6H2O

Stages= Light reactions/Carbon(calvin) reac

Chloroplasts= contain chlorophyll pigment

1 of 8

Redox Process

H to CO2= Red CO2 to sugar.

E- transferred alongside H+ ions.

Req energy provided by light

2 of 8

Overview

Light reac (photo)

  • Thylakoids
  • Split H2O
  • Rel O2
  • Reduce NADP+ to NADPH
  • ATP generated from ADP (photophosphorylation)

Calv cycle (synthesis)

  • Stroma
  • Sugar formed by CO2 using ATP and NADPH.
  • Starts with Carbon Fixation.
3 of 8

Photosystems

II--> Acts first

Captures light effic at 680nmm (red)

I--> Captures light effic at 700nm 

4 of 8

Calvin cycle

Co2 to Sugar

Uses ATP and NADPH

Phases

  • Carbon Fixation
  • Reduction
  • Regeneration Co2 acceptor (RuBP)

Carbon enters as CO2 and leaves as G3P

5 of 8

Photorespiration

1st stage Calv cyc= prod C3 compound.

  • Hot climate closes stomata
  • CO2 dec in leaf
  • Rubisco adds O2
  • Cabon leaves chloroplast as CO2. consumes ATP
6 of 8

C4 Carbon Path

Adaptation for photosynth in hot climates (sugarcane)

7 of 8

CAM Path

Crassulacean Acid Metabolism

Cacti/Pineapples

  • Stomata open at night/close in day
  • CO2 incorporated to organic comp at night
  • Day= CO2 released and available for light fuelled sugar prod
8 of 8

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Physiology resources »