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Explanation: Light dependent reactions of photosynthesis can occur only in the presence of Sunlight. Light reactions are also called Hill reactions after the scientist Robert Hill after his discovery. 1. In light reactions when sunlight falls on the cholorophyll, it gets activated and starts the process. 2.
As the name suggests, the light-dependant reaction depends on sunlight to carry out photosynthesis. Here, it traps solar energy and uses it to generate ATP and NADPH. There are 4 steps to a light-dependant reaction. First, photosystem II absorbs a photon, which excites an electron causing it to go to the electron acceptor, which means that photosystem II is now missing an electron. It regains ...
The light reaction has two events i.e., photolysis of water and photo phosphorylation. In light reaction, light energy is stored in chemical eneygy. The end products are oxygen, ATP and NADPH. Light deepndent-reactions are performed only in presence of light. There are two main main events of photosynthesis i.e., light reaction and dark reaction.
Photosynthesis consists of a photochemical reaction (Hill reaction) which occurs in the presence of light. In this reaction, oxygen is released when chloroplasts are exposed to light. In the photochemical reaction, electrons flow from H2O to NADPH2 because electrons are boosted to high energy levels by the absorbed light. This reaction takes place in the thylakoid membranes in the chloroplast ...
The light-dependent reactions take place in the grana of the thylakoids and stroma. 1. The whole photosynthesis processes are categorized into light dependent and light independent. 2. The light-dependent reactions take place in the grana of the thylakoids and stroma. 3. The end products of light dependent reactions are oxygen, ATP and NADPH.
The reactions which need light to occur are called light dependent reactions and the reactions which are ...
krishna kishore G. Mar 5, 2016. Light dependent reactions function is to produce assimilatory power-ATP and NADPH which will be used to produce glucose in dark reactions. Oxygen is also produced during the light phase of photosynthesis. Answer link.
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.
Light reactions of photosynthesis are light dependent reactions. They are light dependent because for the process to start, a light ray should impinge on the chlorophyll and only then the reactions of photosynthesis begin. Dark reactions of photosynthesis are light independent. The entire process of Photosynthesis can be divided into two stages.
ATP and NADPH provide the chemical energy needed to keep the cycle running. ATP and NADPH are built up during the light dependent reaction. The light-independent reaction converts CO_2 into glucose. Glucose is needed for cellular respiration. The light-independent reaction is also referred to as the dark reaction because it does not require light.