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David Chung
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What special pigment do plant cells contain?
Chlorophyll in the chloroplasts and other accesory pigments (p680 in PSII and p700 in PSI)
What catches sunlight during photosynthesis?
Photo systems embedded on the thylakoid membranes catches light. photo systems are of two type PSII and PSI. photo systems consists of chlorophyll and accessory pigments. these catch the sunlight for the process of photosynthesis.
How is H electrochemical gradient established and maintained in photosynthesis?
The formation of NADPH, the movement of electrons from PSII to PSI, & the splitting of water
What photosystems are embedded in the electron transport chain?
PSII, PSI, cytocromes, ferrodoxins are the part of ETC. They transport the protons to ATPase to produce ATP.
What is the difference between photosynthesis I and photosynthesis II?
Photosynthesis II or PS II (photosystem II) comes before PS I. PSII uses a pair of P680 chlorophyll a, while PSI uses a pair of P700 chlorophyll a. These systems populate the thylakoid membrane.First, light hits PS II and excites its pigment molecules and the energy bounces off the pigment molecules until it gets to the P680 chlorophyll and excites its electrons which then causes it to give off an electron to the Primary electron acceptor.Now the pair of P680 is deprived of an electron, this is where water comes nto play. An enzyme catalyzes the splitting of water to produce O2 and two electrons, these electrons supply the ones that the pair of P680 chlorophyll gave away, this enables the P680 to be able to get excited again and again without being deprived of electrons.Back to the primary acceptor, the excited electron passes from PS II to PS I via the Electron Transport chain. This produces ATP.The electron then is at the P700 pair of chlorophyll a's of PS I which excites it and it gives off that electron to another primary electron acceptor which transports its electrons via ETC as well, but the final electron acceptor is NADP+, which with the electron becomes: NADPH.
What special pigment do plant cells contain?
Chlorophyll in the chloroplasts and other accesory pigments (p680 in PSII and p700 in PSI)
What is the difference between PSI and PSII?
Photosystem I - 700nmPhotosystem II - 680nm
What catches sunlight during photosynthesis?
Photo systems embedded on the thylakoid membranes catches light. photo systems are of two type PSII and PSI. photo systems consists of chlorophyll and accessory pigments. these catch the sunlight for the process of photosynthesis.
How is H electrochemical gradient established and maintained in photosynthesis?
The formation of NADPH, the movement of electrons from PSII to PSI, & the splitting of water
What photosystems are embedded in the electron transport chain?
PSII, PSI, cytocromes, ferrodoxins are the part of ETC. They transport the protons to ATPase to produce ATP.
How is light energy processed in the light reaction of photosynthesis?
In simple terms, photosynthesis is the conversion of carbon dioxide (CO2) to carbohydrate (CH2O). To do this two things are needed: energy to drive the reaction and a source of hydrogen. The light reaction of photosynthesis produces two essential substances: ATP and NADPH. ATP provides the energy for the conversion of CO2 to CH2O, and NADPH provides the hydrogen. The light reaction depends on groups of chlorophyll molecules, called photosystems, absorbing light energy. The energy is used to eject high energy electrons from the chlorophyll. The energy in the electrons is then used to make ATP and NADPH. There are two photosystems, called photosystem I (PSI) and photosystem II (PSII), which work in sequence. (PSII comes before PSI in the sequence, but they were discovered and named in the reverse order!). PSII absorbs light and emits a high energy electron. The energetic electron then passes down a series of molecules, called an electron transport chain (ETC), releasing energy as it goes (you can visualise it as a ball bouncing down a set of stairs, losing energy as it falls). The energy released is used to make the energy carrier compound ATP. To replace the electrons lost from chlorophyll in PSII water (H2O) is split into hydrogen ions (H+), electrons (e-) and oxygen atoms (O): H2O = 2H+ + 2e- + O This is the source of the oxygen released by photosynthesis. The second photosystem, PSI, also absorbs light and emits a high energy electron from chlorophyll. The energy in this electron is used to drive the synthesis of NADPH from NADP+ ,hydrogen ions (H+) and electrons (e-): NADP+ + 2H+ + 2e- = NADPH + H+ The hydrogen ions needed for this come from the water which was split by PSII. The electrons lost from the chlorophyll in PSI are replaced by the electrons ejected from PSII. The result of all this is that light energy is converted into chemical energy in ATP, water is split to provide the hydrogen needed to make NADPH, and oxygen is released as a waste product. The ATP and NADPH are then used in the light independent reaction (the Calvin cycle) to concert carbon dioxide into carbohydrate.
Where do electrons get their energy from in photo system II?
PSII is a protein that is filled with chlorophyll, specifically P680. This chlorophyll captures the energy of light (light that has a wavelength of 680). That energy is used to split a water molecule into O2 and a hydrogen ion (an electron) and excites that electron that is then passed down the electron transport chain to PSI (filled with P700) where the energy in the light of the wavelength of 700 is used to excite it further. This is a GREAT video for photosynthesis: https://www.youtube.com/watch?v=g78utcLQrJ4
Where do electrons get their energy in photo system II?
PSII is a protein that is filled with chlorophyll, specifically P680. This chlorophyll captures the energy of light (light that has a wavelength of 680). That energy is used to split a water molecule into O2 and a hydrogen ion (an electron) and excites that electron that is then passed down the electron transport chain to PSI (filled with P700) where the energy in the light of the wavelength of 700 is used to excite it further. This is a GREAT video for photosynthesis: https://www.YouTube.com/watch?v=g78utcLQrJ4
When water molecules are split to produce the electrons needed to replace those lost by photo system 2 during photosynthesis what is produced?
Oxygen and H+ the overall equation is, 2H2O ----> O2 + 4H+ + 4electrons electrons as you know are taken up by PSII, H+ go on to form NADPH by combining with NADP+ at the end of PSI and O2 is a by product of photosynthesis
How do you reset the low tire pressure light on a 2011 dodge grand caravan?
There isn't a reset. If all tires are inflated to 36 psi and the light is on, there is a failure and you will need to take it in for service.There isn't a reset. If all tires are inflated to 36 psi and the light is on, there is a failure and you will need to take it in for service.
How do you reset the low tire light on the 2006 Mazda Miata?
If you fill your tire to right PSI the light will reset itself.
What is produce when water molecules are split to produce the electrons needed to replace those lost by photo system 2 during photosynthesis?
Oxygen and H+ the overall equation is, 2H2O ----> O2 + 4H+ + 4electrons electrons as you know are taken up by PSII, H+ go on to form NADPH by combining with NADP+ at the end of PSI and O2 is a by product of photosynthesis
