Photosynthesis and Plant Pigments
Download the Data: Chapter 7 PDF from the tree and complete it in-lab. Upload it to submit it.
QUESTIONS
1.What color is the plant extract? Why?
2.Why does chlorophyll appear green?
3.What causes leaves to turn from green to yellow and red in the fall?
4.On what basis does chromatography separate substances?
5.In order for photosynthesis to occur, the following must be present (Hint: review the photosynthesis equation):
as the energy source.
as the carbon source.
as the carbon source.
for the absorption of light energy.
6.Explain why grow lights for house plants are never green.
7.Explain why plants that are kept in the dark for a week are still to be able to conduct cellular respiration.
8.As you saw from your chromatogram, there are more pigments present in leaves than you can see. Propose an explanation for why leaves only appear green in the growing season but turn bright colors in the autumn when the weather turns cold.
9.Describe the purpose of the light-dependent reactions and where they occur in the chloroplast.
10.Describe the purpose of the dark reactions and where they occur in the chloroplast.
