Photosynthesis

Question 1

Where does LDR occur?

Answer 1

Thylakoid

Question 2

How is the chloroplast adapted for photosynthesis?

Answer 2

1)The granum has a large surface area to increase absorption of light
2) They have ATP synthase channels to allow synthesis of ATP

Question 3

What is photoionisation?

Answer 3

Electrons in the chlorophyll absorb light, gain energy and become excited
They leave the chloroplast to the electron transport carrier proteins

Question 4

What is photolysis?

Answer 4

The splitting of H2O to produce an electron, a proton and oxygen

Question 5

What is photophosphorylation?

Answer 5

ATP synthase attaches an inorganic phosphate group to an ADP molecule to form ATP

Question 6

Describe the LDR

Answer 6

1)Electrons in the chlorophyll absorb light, gain energy and become excited
They leave the chloroplast to the electron transport carrier proteins- photoionisation
2) Electrons are replaced by photolysis- H2O molecule splits into an electron, a proton, and an oxygen molecule
3) Electrons are passed along the electron carrier proteins (ETC) via a series of redox reactions
4) This releases energy via a series of redox reactions
5) This energy is used to actively pump H+ through the thylakoid membrane into lumen causing a H+ ion concentration gradient
6) H+ ions diffuse out of ATP synthase to stroma causing for the enzyme to add a Pi to ADP to make ATP (photophosphorylation)
7) H+ and e- reduce NADP to make reduced NADP
7)
6)