Photosynthesis Flashcards
Photosynthesis
Synthesis of food from Co2 and water in presence of chlorophyll and light energy
Significance of Photosynthesis
Food for all living things, Oxygen
What are grana?
Piles of thylakoids
Stroma
Colourless ground fluid in a chloroplast
What is the tradeoff of photosynthesis?
Transpiration through open stomata
How do guard cells open?
ATP pumps K+ ions into guard cells, leading to them being turgid
How do guard cells close?
K+ ions leak out of the cell leading to the cell becoming flaccid again
What is the site of photosynthesis?
Mesophyll cells
What is the equation to represent photosynthesis?
6CO2 + 12H2O -> C6H12O6 + 6H2O + 6O2
What is the light phase?
The phase of photosynthesis depending on light taking place in the thylakoids.
What is the reaction for photolysis of water?
2H2O -> 4H+ + 4e- + O2
What is polymerization
Formation of starch using multiple molecules of glucose
What is photophosphorylation?
Addition of a phosphate group to ADP to form ATP using photons
Adaptations in leaf to perform photosynthesis are:
Leaf arrangement,
abundance of chloroplasts in upper layers of the leaf,
extensive vein system for rapid transport to and from mesophyll cells
Use of water formed after photosynthesis is:
Can be used to continue the reaction.
