Topic 5 A

Question 1

Where do light dependent reactions occur?

Answer 1

In the thylakoid membrane

Question 2

What is part of process of the light dependent reaction?

Answer 2

Photophosphorylation

Question 3

Where does the light independent reaction occur?

Answer 3

In the stroma

Question 4

What is part of the light independent reaction?

Answer 4

calvin cycle

Question 5

What is the chemiosmotic theory?

Answer 5

Electrons moving down the etc , creating a proton gradient across the membrane to drive ATP synthesis

Question 6

What is part of aerobic respiration?

Answer 6

Glycolysis, link reaction, krebs cycle, and oxidative phosphorylation

Question 7

What are the products of the light dependent reaction?

Answer 7

Reduced NAD, Oxygen, 2 electrons

Question 8

What are the products of the light independent reaction?

Answer 8

useful organic substances (hexose sugars),

Question 9

What are the products of glycolysis?

Answer 9

2 reduced NAD- used in oxidative phosphorylation
2 Pyruvate- actively transported to matrix for link reaction
2 ATP (net gain)- Used for energy

Question 10

What are the products of two link reactions for one glucose molecule?

Answer 10

2 acetyl CoA- krebs cycle
2 CO2- waste product
2 reduced NAD- oxidative phosphorylation

Question 11

What are the products of one krebs cycle?

Answer 11

1 CoA- used in next link reaction
oxaloacetate- regenerated for next cycle
2 CO2- waste product
ATP- used for energy
3 Reduced NAD- oxidative phosphorylation
1 reduced FAD- oxidative phosphorylation

Question 12

How does oxidative phosphorylation occur?

Answer 12

NADH transfers two electrons to the first protein in the electron transport chain, protein is reduced, two electrons pass to the second protein so first protein is oxidised and second is reduced. They lose energy which is used to pump protons from the matrix to the intermembrane space, build up, electrons continue to move down electron transport chain, they eventually lose their energy and are combined with oxygen and two hydrogen ions to make water. Oxygen is final electron acceptor. electrons from FADH enter in the middle of the chain, proton gradient sued to generate ATP. done by Protons diffusing down the ion chnanel in ATP synthase into the matrix, used to make ATP out of ADP and pi (chemiosmosis)