8.2

8.2 Summary

• Sunlight = for of electromagnetic energy


• Electromagnetic spectrum can show the range of electromagnetic energy.(colors are due to the pigments)


• Paper chromatography helps to discover the pigment.


• Water splitting photosystem and the producing NADPH is involved in the light reactions.

1) Explain why a leaf appears green.
A leaf appears green because green light is not absorbed.
2) Describe what happens when a molecule of chlorophyll a absorbs light.
3) Besides oxygen, what two molecules are produced by the light reactions?
The two other molecules are ATP and NADH.
4) Where in the chloroplast do the light reactions take place?
They take place in the thylakoid.