| Symbol equation for photosynthesis | 6CO2 + 6H2O --> C6H1206 + 602 |
| Describe the four molecules produced from glucose in biosynthesis? | Proriens - glucose + nitrates = amino acids. Lost of amino acids > protien
Lipids - used for storage in seeds
Starch - Lots of glucose molecules > starch, insolluble glucose stored
Cellulose - Used to build and add strength to cell walls |
| Practical to investigate how light intensity effects photosynthesis | 1)Fill boiling tube 45cm^2 sodium hydrocarbonate soloution, leave for a few mins then shake air bubbles out.
2)Cut 8cm pondweed and place carefullt in boiling tube.
3)Place 10cm away from light source count n.o. bubbles for 5 minutes.
5)repeat at further distanes at interval of 5cm.
4)repeat 5 times and calculate average mean. |
| Give 4 extensions to the light intensity practical. | 1)Collect gas in syringe.
2)Use data logging equipment to mesure oxygen concetration.
3)Use acecate filters to mesure effects of different wavelengths.
4)Use veriegated plants (Type of leave with pale edges)
- Drop veriegated leaf in boiling water to kill and preserve it.
- Leave in hot ethanol for 10 minutes to remove chlorophyll.
- Dip in boiling water to soften then spread in petri dish and cover with iodine.
- Areas that had chlorophyl > blue/black, areas without remain pale. |
