Cyclic and non-cyclic phosphorylation

Question 1

what are the two types of phosphorylation?

Answer 1

cyclic and non-cyclic

Question 2

what are the steps of cyclic phsophorylation?

Answer 2

• Photosythetic pigemnets e.g. chlorophyll a absorbs light energy into photosystem 1
• excites an electron to a higher energy level
• electron flows through an electron transport chain releasing its energy
• energy used to create a proton gradient
• hydrogen ions flow back into the stroma through ATP synthase
• this provides the energy for ADP + Pi -> ATP

Question 3

Summary of cyclic phosphorylation?

Answer 3

• Photosystem 1 only
• ATP only made
• electrons are recycled
• uses electron transport chain
• photosystem 1 - obtains electrons from itself

Question 4

Summary of non - cyclic phosphorylation?

Answer 4

• Photosystem 1 and 2
• reduced NADP and ATP made
• oxygen
• electron leaves Photosytem 1 to reduce NADP
• electrons replaced
  photolsysis of water
• uses electron transport chain
  -photosystem 1 obtains electrons from photosystem 2
• electrons obtain electrons from photolysis from water