AP Bio Chapter 9 Photosynthesis Part 3

Question 0

What is a waste product of noncyclic electron flow

Answer 0

Oxygen, becomes a major input for aerobic cellular respiration

Question 1

What’s the purpose of water in noncyclic electron flow

Answer 1

Water provides the replacement electrons (photolysis). This creates 4 protons and 1 molecule of oxygen for every 2 water molecules consumed

Question 2

What is the path of electrons on noncyclic electron flow

Answer 2

Electrons move from photosystem 2 to photosystem 1 via ETC From p1 they are transferred to the enzyme NADP- reductase which uses the, to reduce NADP+ into NADPH.

Question 3

What does noncyclic electron flow produce and require

Answer 3

Both ATP and NADH

Water

Question 4

What is the pathway of an electron in cyclic electron flow

Answer 4

Electrons move from p1 to the ETC before returning to photosystem 1

Question 5

What does cyclic electron flow produce and require

Answer 5

Only ATP

No required water

Question 6

Why doesn’t cyclic electron flow require water

Answer 6

The Calvin cycle will require 9ATP and 6NADH for energy sugar produced.