Lecture 13: Generation of energy in plants

Question 1

Why care about photosynthesis?

Answer 1

• Improving photosynthesis could improve crop production?

Question 2

There are two stages of photosynthesis:

Answer 2

• Harvesting light energy in thylakoid membrane
• Products from ^^^ are used to drive 2nd step
• Which occurs in stroma

Question 3

Which wavelengths of light (nm) are absorbed for photosynthesis?

Answer 3

• 400 - 500 / 600 - 700

Question 4

The two primary pigments involved in photosynthesis are…and are embedded in the…

Answer 4

• Chlorophyll A & B
• Thylakoid membrane
• (Light harvesting complexes)

Question 5

Photosystems harvest light by..

Answer 5

1. Photon
2. Transfer of energy
3. Excitation of e- from special chlorophyll
4. This e- is transferred to primary e- acceptor

Question 6

What photosystems are in the thylakoid membrane?

Answer 6

• Photosystem II

- Photosystem I

Question 7

Photosynthetic electron transport chain…

Answer 7

• 2e- in PSII, move out to a protein, electrons in PSI leave, electrons from PSII replace electrons left in PSI, electrons move to NADP+
• ATP synthase takes up Hydrogen ions