What is the difference between the cyclic electron transport and Noncyclic photophosphorylation?
What is the difference between the cyclic electron transport and Noncyclic photophosphorylation?
Cyclic photophosphorylation happens only in the photosystem I but non-cyclic photophosphorylation occurs in both the photosystems I and II. In the cyclic photophosphorylation, only ATP is produced, whereas, in the non-cyclic photophosphorylation both NADPH and ATP are produced.
How are cyclic and non-cyclic electron flow different?
Cyclic photo-phosphorylation in photosynthesis light dependent reaction leads to the formation of ATP and NADPH, and the electrons go from water to PSII to PSI and eventually to NADPH. In non-cyclic photo-phosphorylation only some ATP is produced and the electrons go from PSII to PSI and back again.
What is the difference between noncyclic and cyclic electron flow in terms of the products and the pathways the electrons follow?
So in non-cyclic photophosphorylation, you make oxygen, from splitting the water molecule, you make ATP using the H+ ions and you make NADPH. In cyclic photophosphorylation, you only use photosystem I. There is no splitting of water – the electrons only come from the light harvesting complex.
What are the similarities between cyclic and non cyclic electron transport?
Similarities between cyclic and noncyclic phosphorylation Ø Both cyclic and noncyclic photophosphorylations are light reactions. Ø Both are dependent on light. Ø Both are electron transport systems. Ø Both pathways produce assimilatory powers.
What is non cyclic electron transport system?
Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I (P700) but not photosystem II (P680). This process produces no NADPH and no O2, but it does make ATP.
Why does non cyclic phosphorylation shift to cyclic phosphorylation?
The concentration of NADPH in the chloroplast may help regulate which pathway electrons take through the light reactions. When the chloroplast runs low on ATP for the Calvin cycle, NADPH will accumulate and the plant may shift from noncyclic to cyclic electron flow.
What is difference between oxidative phosphorylation and photophosphorylation?
Note: Oxidative phosphorylation occurs in mitochondria and converts chemical energy into ATP….Differentiate between oxidative phosphorylation and photophosphorylation.
| Points | Oxidative phosphorylation | Photophosphorylation |
|---|---|---|
| Site | It occurs in mitochondria | It occurs in chloroplast |
What is difference between photosynthesis 1 and photosynthesis 2?
Photosystem I (PS I) and photosystem II (PS II) are two multi-subunit membrane-protein complexes involved in oxygenic photosynthesis. The main difference between photosystem 1 and 2 is that PS I absorbs longer wavelengths of light (>680 nm) whereas PS II absorbs shorter wavelengths of light (<680 nm).
What is non cyclic electron transport?
In a process called non-cyclic photophosphorylation (the “standard” form of the light-dependent reactions), electrons are removed from water and passed through PSII and PSI before ending up in NADPH. This process requires light to be absorbed twice, once in each photosystem, and it makes ATP .
What is the difference between cyclic and non-cyclic photophosphorylation?
Let us have a look at the important differences between cyclic and non-cyclic photophosphorylation. Following are the important difference between cyclic and non-cyclic photophosphorylation: It is the synthesis of ATP coupled with electron transport activated only by PS-I.
What do you mean by photophosphorylation?
This process is known as photophosphorylation. Photophosphorylation can happen via two pathways known as cyclic and noncyclic photophosphorylation. During cyclic photophosphorylation, high energy electrons travel through electron acceptors in cyclic movements and release energy to produce ATP.
How do electrons travel in a non-cyclic way?
Electrons travel in a non – cyclic manner. Electrons from Photosystem I are accepted by NADP. ATP molecules are produced. Both NADPH and ATP molecules are produced. Water is not required. Photolysis of water is present. NADPH is not synthesized. NADPH is synthesized. Oxygen is evolved as a by-product. This process is predominant only in bacteria.
What is cyclic electron flow in photosynthesis?
In cyclic electron flow, the electron starts in a pigment complex called photosystem I, then it passes from the primary acceptor to ferredoxin then to plastoquinone, and then to cytochrome b6f (a similar complex to that is also found in mitochondria), and then to plastocyanin before coming back to chlorophyll.
