Question
Cyclic photophosphorylation and Non-cyclic photophosphorylation
| Cyclic photophosphorylation | Non – cyclic photophosphorvlution |
| 1. Electrons emitted by chlorophyll return back to the same chlorophyll. | The electrons emitted by chlorophyll do not return back to the same chlorophyll. |
| 2. First electron acceptor is $FRS.$ | First electron acceptor is $CO – Q$ |
| 3. It forms only $ATP.$ | $NADPH_2$ and ATP are formed. |
| 4. Does not involve photolysis of $H_20.$ | Involves photolysis of $H_20.$ |
| 5. No evolution of $0_2.$ | There is evolution of $0_2.$ |
| 6. Only Photosystem-I $(P700)$ is involved in this cycle. | Both Photosystem $PS-I (P700)$ as well as $PS-II (P680$) are involved. |
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| Column I (Phases) | Column II (Their events) |
| 1. Leptotene | (a) Crossing over |
| 2. Zygotene | (b) Desynapsis |
| 3. Pachytene | (c) Synapsis |
| 4. Diplotene | (d) Bouquet stage |