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2021-05-14

What reaction takes place during photosynthesis?

What reaction takes place during photosynthesis?

During the photosynthesis process, plants capture light energy and use that energy to make glucose. Another product of this reaction is oxygen, which is released as a gas.

What are the two major steps of photosynthesis quizlet?

In photosynthesis, what are the two major reactions that take place? The light independent (Calvin Cycle) and dependent reaction (Water Split).

What are the 2 reactions that occur in the chloroplast?

The light-dependent reactions take place in the thylakoid membranes in the granum (stack of thylakoids), within the chloroplast. The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions).

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What are the 2 types of photosynthesis?

There are two types of photosynthetic processes: oxygenic photosynthesis and anoxygenic photosynthesis. The general principles of anoxygenic and oxygenic photosynthesis are very similar, but oxygenic photosynthesis is the most common and is seen in plants, algae and cyanobacteria.

What are the 2 stages of photosynthesis and where do they occur?

Figure: The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.

Why is it called non cyclic Photophosphorylation?

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 is the difference between cyclic Photophosphorylation and Noncyclic Photophosphorylation?

Differentiate Between Cyclic and 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.

What is produced in cyclic Photophosphorylation?

The ATP and NADPH from the light-dependent reactions are used to make sugars in the next stage of photosynthesis, the Calvin cycle. In another form of the light reactions, called cyclic photophosphorylation, electrons follow a different, circular path and only ATP (no NADPH) is produced.

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Why do plants have both cyclic and noncyclic Photophosphorylation?

In non-cyclic photophosphorylation both NADPH and ATP are produced while in the cyclic one only ATP is produced. So, The cyclic one is needed at this time because it can generate ATP with less cost.

What is the difference between linear and cyclic electron flow?

In linear electron flow (unbroken arrows) energy from absorbed photons is used to oxidise water on the luminal face of photosystem II (PS II). In cyclic electron flow, energy from absorbed photons causes the oxidation of the reaction centre (P700) in PS I.

Which one does not occur in cyclic Photophosphorylation?

Cyclic photophosphorylation produces ATP only. It does not involve the formation of NADPH.

What is the purpose of cyclic Photophosphorylation?

ATP produced by endogenous cyclic photophosphorylation was found to play an important role in shortening the lag period in CO2 assimilation and in the formation of sugar phosphates.

Why does cyclic Photophosphorylation occur?

Cyclic Photophosphorylation: In this type, when an electron gets excited, it leaves chlorophyll, then they travel through the electron transport circuit. Then, they return to chlorophyll again after the energy transfer process to ATP is completed.

What is the role of water in non-cyclic Photophosphorylation?

What is the role of water in noncyclic photophosphorylation? It directly generates ATP. It harvests light energy. It collects the electrons for the Calvin-Benson cycle.

What is the main function of water in Photophosphorylation?

Water Photolysis Water acts as a reducing agent by providing H+ ions that convert NADP to NADPH. Since NADPH is an important reducing agent present in chloroplasts, its production results in a deficit of electrons, resulting from oxidation of chlorophyll.

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How much ATP is produced in non-cyclic Photophosphorylation?

In non-cyclic photophosphorylation 1 ATP and 2 NADPH2 molecules are produced.

Where does cyclic Photophosphorylation occur?

Cyclic Photophosphorylation is the process in which organisms (like prokaryotes), just accomplish the conversion of ADP to ATP for immediate energy for the cells. This type of photophosphorylation usually occurs in the thylakoid membrane.

What are the cyclic pathways?

The cyclic pathway of photosynthesis produces ATP without producing NADPH. The cyclic pathway of photosynthesis uses just one photosystem: photosystem I. This pathway is simpler than the non-cyclic reactions. Those electrons then pass through another electron transport chain until they are accepted by NADP+.

What is meant by non-cyclic Photophosphorylation?

non-cyclic photophosphorylation The light-requiring part of photosynthesis in higher plants, in which an electron donor is required, and oxygen is produced as a waste product. It consists of two photoreactions, resulting in the synthesis of ATP and NADPH 2.

How cyclic and non-cyclic electron flow are different?

1 Answer. 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.