Unit 3 Photosynthesis

Question 1

What is photosynthesis

Answer 1

Light + water + CO2 –> glucose + oxygen

occurs in chloroplast

Question 2

Light dependent reaction/ETC
1. Photoexcitation
2. ETC
3. Photoexcitation

Answer 2

1. Photoexcitation: Photosystem 2 is hit with a photon (light)
2. electrons move from pigment to pigment untill out of photosystem.
3. a seconds photon has hit photosystem 1

Question 3

Names of the proteins in the ETC in light dependent reactions
1.
2.
3.
4.
5.
6.
7.

Answer 3

1. photosystem 1
2. PQ (plastoquannin)
3. cytohrome B6-& complex
4. PC (plastoquine)
5. photosystem 1
6. Fd (ferredoxin)
7. NADH reductase

Question 4

where does light dependent reaction take place?

Answer 4

Thylakoid
membrane + lumin

Question 5

difference between photosystem 2 vs 1

Answer 5

photosystem 2:
-680nm light absorbtion
-split water

photosystem 1: 700nm
-reduse NAD+ –> HADH

Question 6

Net yield of light dependent reaction

Answer 6

oxygen + NADH + electrochemical gradient

Question 7

Net yeild of Calvin cycle
ATP : NADH –> G3P : ADP: NAD

Answer 7

ATP : NADH –> G3P : ADP: NAD
18 : 12 –> 2 : 18: 12