8.3

Question 1

products in light independent reactions—

Answer 1

NADP,

Question 2

What is photoactivation?

Answer 2

light energy raises the energy level of electrons in the chlorophyll. energy from the photoactivated election is used to pump protons across the thylakoid membrane . Hydrogen ions accumulate in the thylakoid space. This generates a high H+ concentration gradient. Protons move through ATP synthase, through chemiosmosis

Question 3

What happens in photosystem 1?—–

Answer 3

electrons are activated by light. these are received by ferrédoxine and used to reduce

Question 4

Explain how the light-independent reactions of photosynthesis rely on the light-dependent reactions

Answer 4

Light causes

Question 5

What are the components in the chloroplasts?

Answer 5

• thylakoid
• grana
• photosystems
• stroma
• lamellae

Question 6

Grana

Answer 6

thylakoids are arranged in stacks to increase SA:V ratio of the thylakoid membrane

Question 7

What are the 3 steps in the light dependent reaction?

Answer 7

1. excitation of photosystems by light energy
2. Production of ATP via an ETC
3. reduction of NADP+ and the photolysis of water

Question 8

What are photosystems?

Answer 8

groups of photosynthetic pigments embedded within the thylakoid membrane