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level: Photosynthesis

Questions and Answers List

level questions: Photosynthesis

QuestionAnswer
Symbol equation for photosynthesis6CO2 + 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 photosynthesis1)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.