2. A physico -chemical process by which they use light energy to drive the synthesis of organic compounds

4. primary source of food on earth responsible for release of oxygen into the atmosphere

5. Chlorophyll, light and CO2 are the requirement Experiment with leaf that was partially covered Experiment with KOH containing bottle

6. Bell jar experiment by Priestly (1770 Modified experiment with bell jar by Jan Ingenhouse

7. 1854- Julius von Sachs- evidence for production of glucose T W Engelmann 1843-1909- first action spectrum of photosynthesis Middle of 19 th century – the key features of plant photosynthesis CO2+ H2O [CH2O] + O2 Milestone contribution- Cornelius van Niel (1897-1985)- photosynthesis a Light dependent reactions and evoloved the formula 2H2A+ CO2 2A+ CH2O+ H2O

15. 400500 600700 Rate of absorption wavelength

16. 400500 600700 Rate of Photosynthesis wavelength

17. Photochemical phase – absorption, water splitting, oxygen release And formation of ATP AND NADPH2

18. Primary acceptor Pigment molecules Reaction centre Photon

20. 2H 2 O4H + + O 2 + 4e - 2H 2 O 4H + + O 2 + 4e -

21. Light Chlorophyll P 700 Electron Transport System Electron Transport System e - acceptor

22. PHOTOSYSTEM II CYTOCHROMES b&f PHOTOSYSTEM I ATP synthase Thylakoid membrane Lumen Stroma

25. Ribulose 1,5 Biphosphate 3-phosphoglycerate Triose phosphate

28. Plasmodesmata PLASMA MEMBRANE CELL WALL HCO3-PEP FIXATIONREGENERATION C4 ACIDC3 ACID TRANSPORT DECARBOXYLATION C4 ACID C3 ACID ATMOSPHERIC CO2 CO2 C3 CYCLE

29. Photorespiration can occur when carbon dioxide levels are low, for example, when the stomata are closed to prevent water loss during drought. In most plants, photorespiration increases as temperature increases. Photorespiration produces no ATP and leads to a net loss of carbon and nitrogen (as ammonia), slowing plant growth. Potential photosynthetic output may be reduced by photorespiration by up to 25% in C3 plants. [2] [2]

31. If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value: it is the factor which directly affects the process if its quantity is changed.