Photosynthesis

Question 0

What is the overall equation for photosynthesis?

Answer 0

6CO2 + 6 H2O -> C6H12O6 + 6O2

Question 1

How is a leaf adapted for photosynthesis?

Answer 1

Large SA
Thin for short diffusion distance
Numerous stomata
Xylem 
Phloem

Question 2

What are the 3 main steps in photosynthesis?

Answer 2

1) capturing light energy (chlorophyll)
2) light dependent reaction
3) light independent reaction

Question 3

What is the main structure of a chloroplast?

Answer 3

Thylakoids = disk like structures, site of light dep., attached to others by inter granal lamellae

Grana = stacks of up to 100 thylakoids

Stroma = fluid filled matrix, light indep. (Starch grains)

Question 4

Summarise the light dependent reaction

Answer 4

1) PHOTOLYSIS
2) electrons gain energy from light absorbed by chlorophyll in photo system
3) electron carriers ox/red and energy
4) energy pulls proton through thylakoids membrane (active)
5) high proton conc in thylakoid space
6) proton moves back through membrane
7) activates ATP synthase
8) in stroma proton reduces NADP

Question 5

How is the thylakoid membrane adapted?

Answer 5

Large SA for attachment of chlorophyll

Granal membranes attached to ATP enzymes

Question 6

Where does the light dependent (1) reaction take place?

Answer 6

Thylakoids

Question 7

Where does the light independent (2) reaction take place?

Answer 7

Stroma