Cyclic photo phosphorylation

Non-cyclic photo phosphorylation

1. The electron recycles back to the system.

1. The electron doesn’t recycle back to the system.

2. Only PSI is involved.

2. Both PSI and PSII are involved.

3. Water is not used for photolysis.

3. Water is used for photolysis.

4. The electrons and protons are used to produce two ATP molecules without NADPH_2.

4. The electrons and protons are used to produce single ATP and one molecule of NADPH_2.

5. It produces low energy.

5. It produces more energy hence efficient.

6. There is single primary acceptor of electron.

6.There are two primary acceptor of electron.

7. Terminal electron acceptor is PSI.

7. Terminal electron acceptor is NADP, which accepts proton also.

8.It is common in bacteria, lower algae, etc.

8. It is commonly present in higher plants including cynobacteria.