Photosynthesis 0.0 / 5 ? BiologyCellular processesA2/A-levelOCR Created by: ruvimbo mukonoCreated on: 05-04-17 20:51 Name metabolic activities that require energy Active transport, anabolic reactions, movement 1 of 20 Name th main process that synthesises ATP Chemiosmosis 2 of 20 How are electrons raised to a higher energy level? (2) Electrons in pigment (chlorophyll) are excited when light is absorbed High energy electrons released from bonds breaking 3 of 20 What are the excited electrons used for Generate a proton gradient 4 of 20 Define autotroph Make their own food using light 5 of 20 Give th equation of photosynthesis 6CO2 + 6H2O -> 6O2 + C6H12O6 6 of 20 Name the structures of a chloroplast Stroma, grana (thylakoid stacks), lamellae 7 of 20 Why do pigments have different colours Absorb and reflect different wavelengths of light 8 of 20 Name the primary pigment in photosynthesis Chlorophyll (absorbs red and blue) 9 of 20 what Are the 2 main stages of photosynthesis Light dependant stage & light independent stage 10 of 20 Explain the process of non- cyclic photophosphrylation PSII &a PSI (photosystems 1&2) absorb light. Electrons are excited. ATP made by chemiosmosis. Remaining electrons are accepted by NADP 11 of 20 Explain photolysis Water split into H+ ions and electrons and O2 (oxygen) 12 of 20 Explain the process of cyclic photophosphorylation PSI produces ATP, electrons returned to PSI instead of making NADPH 13 of 20 Where does the light independent stage occur Stroma 14 of 20 Explain what happens in the Calvin cycle Fixation - CO2 fixed with RuBP Reduction - GP reduced to TP Regeneration - RuBP regenerated 15 of 20 Name the limiting factors that affect rate of photosynthesis Light intensity, carbon dioxide concentration, temperature 16 of 20 Define limiting factor Variable which is in short supply, reduces rate of photosynthesis 17 of 20 What happens to concentration of GP & TP when light intensity decreases GP increases, TP decreases 18 of 20 What is the effect of temperature on the Calvin cycle GP, TP & RuBP concentrations decrease - less kinetic energy for enzymes 19 of 20 What is the effect of low CO2 concentration on the Calvin cycle GP, TP decrease, RuBP increases 20 of 20
Comments
No comments have yet been made