E4: Photosynthesis

phenol red

dye used to indicate the absence of CO2

carbonic acid

compound formed by blowing CO2 to water

yellow

color of sample with CO2

cyclosis

movement of chloroplast around the cytoplasm to optimize light absorption

Hydrilla verticillata

scientific name of water thyme

Graptophyllum pictum

plant used in “chlorophyll as a factor of photosynthesis”

sodium bicarbonate

compound added to dumbcane disks

acetone

added to leaves to obtrain green extract

petroleum-ether acetone

solvent for paper chromatography

nonpolar

polarity of petroleum ether acetone

carotene

least polar

chlorophyll b

most polar

chlorophyll b < chlorophyll a < xantophyll < carotene

trend in increasing Rf

chlorophyll b < chlorophyll a < xantophyll < carotene

trend in increasing polarity

1% sodium bicarbonate NaHCO3

source of CO2 in light as a factor in photosynthesis