ETIABO: Photosynthesis - Light Dependent reaction

Question 1

NADP is an example of a _______.

Answer 1

Coenzyme

Question 2

Gaining an electron is _______.

Answer 2

Reduction

Question 3

Loosing an electron is _______.

Answer 3

Oxidation

Question 4

Electrons at the end of the ETC react with ______ and _______ to form _______.

Answer 4

NADP and H+ to form reduced NADPH

Question 5

What are the two products of the LDR?

Answer 5

ATP
(Reduced) NADPH

Question 6

Where does the LDR occur?

Answer 6

Thylakoid membranes

Question 7

What coenzyme catalyses the reaction between ADP + Pi?

Answer 7

ATP synthase

Question 8

The catalysing of ADP + Pi requires energy. Where is this energy sourced from?

Answer 8

H+ ions in photophosphorylation

Question 9

What are electrons lost in photoionisation replaced by?

Answer 9

• Protons
• Electrons
• Oxygen

Question 10

What is the role of protons produced in replace of lost electrons in photoionisation?

Answer 10

Help maintain the high concentration of protons in the thylakoid space.

Question 11

What is the role of oxygen produced in replace of lost electrons in photoionisation?

Answer 11

• Used in respiration
  OR
• Diffuse out the plant

Question 12

What happens in photolysis?

Answer 12

Light splits water into protons, electrons and oxygen

Question 13

Why is the thylakoid membrane having a large surface area an advantage?

Answer 13

Maximises the amount of ATP and NADPH that can be made at one time.

Question 14

Proteins in the grana hold the chlorophyll in such a way so that _________________.

Answer 14

Maximum amount of light can be absorbed

Question 15

The thylakoid membranes are partially permeable, allowing them to establish and maintain a _______________.

Answer 15

Proton gradient