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This is a speculative area! The most detailed studies and reasoning relevant to this question are perhaps those of Nathan Nelson, who has used genomic analyses of Eubacteria, Archaea, and eukaryotes to draw up a tentative evolutionary tree of photosynthetic reaction centers.
His conclusion is that photosystems I and II, or rather, reaction centers of these two types, had a common origin about 2.5 Ga (billion years ago).
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photosystem II
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It was Kodak that invented the first, ever, photosystem for every man to use. In those days you needed to buy the camera and after having taken all the shots, you simply returned the camera (intact) to Kodak. Kodak would then make prints of your photos and return it.
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But I think you meant the photosystem used in photosynthesis lol
photosystem 1 was discovered first, but it does not mean that it evolved first. Photosystem 2 is actually first in the process of capturing light energy. But as you can see, the answer is mainly a mystery, just like "Which came first, the chicken or the egg?" Hope this helped
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What else can I help you with?
How many times are electrons energized during photosynthesis?
The thylakoid membrane contains 2 photosytems, known as Photosystem I and Photosystem II. Together, they function to absorb light and transfer energy to electrons.
How do photosystem 1 and 2 allow the calvin cycle to work?
No. Photosystems I and II are where light-dependent reactions occur, while the Calvin Cycle is where light-independent reactions occur. Photosynthesis begins with Photosystem II, then Photosystem I, then the products from there go to the Calvin Cycle. (yes photosystem II comes before photosystem I)
Some photosynthetic organisms contain chloroplasts that lack photosystem II yet are able to survive so what is the best way to detect the lack of photosystem II in these organisms would be?
One way to detect the lack of photosystem II in photosynthetic organisms is to measure the rate of oxygen production during photosynthesis. Photosystem II is responsible for splitting water molecules and releasing oxygen as a byproduct, so the absence of photosystem II would result in reduced or no oxygen production. Another method is to analyze the pigment composition of the chloroplasts since photosystem II contains specific pigments like chlorophyll a and beta-carotene. If these pigments are absent or reduced, it can indicate the lack of photosystem II.
Where do electrons get their energy in photosystem II?
From energy in photons
The chlorophyll known as P680 has its electron holes filled by electrons from what a. photosystem I. b. photosystem II c. water d. NADPH e. accessory pigments?
Oxidized P680 receives its electrons, from water oxidization. (2H2O --> O2 + 4H+ + 4e-).
Which photosystem most likely envolved first?
Photosystem II most likely evolved first because it provides the energy for producing ATP and passes its electrons to photosystem I.
What Photosystem is older in terms of evolutionary history?
Photosystem II is older in terms of evolutionary history compared to Photosystem I. Photosystem II is thought to have evolved before Photosystem I as it evolved to oxidize water in order to provide electrons for the electron transport chain, which Photosystem I then uses to reduce NADP+ to NADPH.
Which steps occur in photosystem II?
ADP takes on energy and a phosphate to produce ATP in photosystem II.
What happen to the light energy that is trapped by the chloroplast during the first stage of photosynthesis?
Light energy is not exactly trapped. The light energy excites the electron in the reaction centres of photosystem I and photosystem II. The electron excites and transfers to the electron transport chain ( chain of electron carriers), this produces ATP. Then the electron of photosystem II is transferred by photosystem I and the electron of the photosystem I is used with H+ and NADP to form NADPH. Photosystem II gets back an electron from photolysis of water.
The molecule responsible for first capturing the photons energy from sunlight is?
They are the chlorophyll. Photosystem II reacts first
How many times are electrons energized during photosynthesis?
The thylakoid membrane contains 2 photosytems, known as Photosystem I and Photosystem II. Together, they function to absorb light and transfer energy to electrons.
Which photosystem is used first in photosynthesis?
Photosystem 2 happens in photosynthesis before photosystem 1. However they are numbered in order of how they were discovered. Photosystem 1 was discovered before photosystem 2. In photosynthesis the order of them is 2 then 1. meaning that photosystem 1 was discovered 1st but photosystem 2 happens 1st in photosynthesis
What happens to electrons when pigments in photosystem absorb lights?
Photosystem's electron travel through the electron transport chain(etc) where ATP is produced and then back to the photosystem. In non-cyclic photophosphorylation, Photosystem II electron then is absorbed by photosystem I, photosystem I electron used to form NADPH and photosystem II gets its electron from photolysis of water. For you unfortunate children using Novanet: They move through an electron transport chain to photosystem 1.
How do photosystem 1 and 2 allow the calvin cycle to work?
No. Photosystems I and II are where light-dependent reactions occur, while the Calvin Cycle is where light-independent reactions occur. Photosynthesis begins with Photosystem II, then Photosystem I, then the products from there go to the Calvin Cycle. (yes photosystem II comes before photosystem I)
What is photosytem I and II?
Photosystem I and Photosystem II are two protein-based complexes found in the thylakoid membrane of chloroplasts in plants, algae, and cyanobacteria. They are involved in the process of photosynthesis, capturing and converting light energy into chemical energy. Photosystem II functions first in the light reactions of photosynthesis, while Photosystem I follows to further harness light energy and produce ATP and NADPH, which are vital for the synthesis of sugars.
Which is a produced using the energy from photons hitting photosystem ii?
ATP is produced using the energy from photons hitting photosystem II through the process of photosynthesis.
Some photosynthetic organisms contain chloroplasts that lack photosystem II yet are able to survive so what is the best way to detect the lack of photosystem II in these organisms would be?
One way to detect the lack of photosystem II in photosynthetic organisms is to measure the rate of oxygen production during photosynthesis. Photosystem II is responsible for splitting water molecules and releasing oxygen as a byproduct, so the absence of photosystem II would result in reduced or no oxygen production. Another method is to analyze the pigment composition of the chloroplasts since photosystem II contains specific pigments like chlorophyll a and beta-carotene. If these pigments are absent or reduced, it can indicate the lack of photosystem II.
