Table of Contents
- 1 Why ATP formation during photosynthesis is called non cyclic phosphorylation?
- 2 What conditions will trigger cyclic photophosphorylation in plants?
- 3 What is the difference between cyclic and noncyclic phosphorylation?
- 4 What is the importance of the cyclic electron flow to the process of photosynthesis and to the cell?
- 5 How does cyclic differ from Noncyclic photophosphorylation?
- 6 Where does cyclic photophosphorylation take place in leaves?
Why ATP formation during photosynthesis is called non cyclic phosphorylation?
This process is referred to as non- cyclic photophosphorylation because the lost electrons by P680 of Photosystem II are occupied by P700 of Photosystem I and are not reverted to P680. Here the complete movement of the electrons is in a unidirectional or in a non- cyclic manner.
What conditions will trigger cyclic photophosphorylation in plants?
Cyclic photophosphorylation occurs in both aerobic and anaerobic conditions. Only two sources of energy are available to living organisms: sunlight and reduction-oxidation (redox) reactions. All organisms produce ATP, which is the universal energy currency of life.
How does cyclic photophosphorylation produce ATP?
Cyclic photophosphorylation involves only Photosystem I and generates ATP but not NADPH. As the electrons from the reaction center of Photosystem I are picked up by the electron transport chain, they are transported back to the reaction center chlorophyll.
How many ATP are produced in cyclic photophosphorylation?
In cyclic photophosphorylation 2 ATP molecules are produced.
What is the difference between cyclic and noncyclic phosphorylation?
Difference Between Cyclic and Noncyclic Photophosphorylation Photosystem I is involved in the cyclic photophosphorylation process. In the cyclic photophosphorylation, P700 is known to be the active reaction centre. In the non-cyclic photophosphorylation, P680 is known to be the active reaction centre.
What is the importance of the cyclic electron flow to the process of photosynthesis and to the cell?
In higher plants, the generation of proton gradient across the thylakoid membrane (ΔpH) through cyclic electron flow (CEF) has mainly two functions: (1) to generate ATP and balance the ATP/NADPH energy budget, and (2) to protect photosystems I and II against photoinhibition.
Why do plants have both cyclic and noncyclic photophosphorylation?
Both cyclic and non cyclic linear electron transport occur in higher plants chloroplast to maintain the required metabolic rate resulted in production of ATP and NADPH. The cyclic produces only ATP and no reducing powers.
Which of the following phosphorylates ADP to make ATP?
Terms in this set (10) ATP synthase phosphorylates ADP.
How does cyclic differ from Noncyclic photophosphorylation?
In the cyclic photophosphorylation, only ATP is produced, whereas, in the non-cyclic photophosphorylation both NADPH and ATP are produced. In cyclic photophosphorylation, the electrons get expelled by photosystem I and they return to the system.
Where does cyclic photophosphorylation take place in leaves?
stroma lamellae membrane
The cyclic photophosphorylation usually occurs in the stroma lamellae membrane of the leaves. It is called a cyclic process because electron providers and electron acceptors are the same . The process starts from the same molecule and ends at the same.
Why does cyclic photophosphorylation occur?
This is called cyclic photophosphorylation. The chloroplast shifts to this process when the ATP supply drops and the level of NADPH rises. Often the amount of ATP needed to drive the Calvin cycle exceeds what is produced in non-cyclic photophosphorylation.
Why does the cyclic pathway exist?
With the cyclic pathway, plants can save some time and energy. Since photosystem I is accepting electrons that are returned to it, it is not accepting electrons from the previous electron transport chain. Therefore, the first electron transport chain will be backed up, which means that photolysis will not occur.