How is photosystem I different from photosystem II How is it similar?
How are they different? Both photosystems, pigments add energy from light to the electrons. In photosystem II, energy is absorbed by electrons, creating high-energy electrons which are passed on to the electron transport chain but in photosystem I the electrons are picked up by NADP to form NADPH.
How are photosystem 1 and 2 connected?
The connecting electron carriers are oxidized by photosystem I (PS I) and reduced by photosystem II (PS II). The control counteracts the imbalance in electron transport that causes it: oxidized plastoquinone induces PS II and represses PS I; reduced plastoquinone induces PS I and represses PS II.
What two things does photosystem I and photosystem II contain?
There are two types of photosystems: photosystem I (PSI) and photosystem II (PSII). Both photosystems contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules found at the core (reaction center) of the photosystem.
How do the reaction centers of photosystem 1 and 2 differ?
How do the reaction centers of photosystem I and II differ? a. They preferentially absorb slightly different wavelengths of light. Only photosystem I is found in the thylakoid membranes.
Why is it necessary to have both photosystem 1 and 2?
Both photosystem I and II are required for oxygenic photosynthesis. Oxygenic photosynthesis can be performed by plants and cyanobacteria; cyanobacteria are believed to be the progenitors of the photosystem-containing chloroplasts of eukaryotes.
What is the difference between Photosystem I and Photosystem II quizlet?
What is the difference between Photosystem II and Photosystem I? Photosystems II and I have different chlorophylls. PS II has P680 and PS I has P700. Photosystem II comes before Photosystem I.
What is the role of Photosystem II How does that role compare with Photosystem I?
Photosystem II appears sooner than photosystem I in the process of photosynthesis. 2. Photosystem II produces ATP while photosystem I produces NADPH. Photosystem I is sensitive to light wavelengths of 700 nm while photosystem II is sensitive to light wavelengths of 680 nm.
Which photosystem, 1 or 2, most likely evolved first?
Photosystem II most likely evolved first, because it changes electrons lost from chlorophyll a with electrons from water. As photosystem I accept electrons from photosystem II, it probably evolved after photosystem II.
What is the function of photosystem 1 and 2?
Photosystem I (PS I) and photosystem II (PS II) are two multi-subunit membrane-protein complexes involved in oxygenic photosynthesis. Chlorophyll is the pigment involved in capturing light energy. PS 1 contains chlorophyll B, chlorophyll A-670, Chlorophyll A-680, chlorophyll A-695, chlorophyll A-700 and carotenoids.
What are the steps of photosystem 2?
Here are the basic steps: Light absorption in PSII. When light is absorbed by one of the many pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction ATP synthesis. The high-energy electron travels down an electron transport chain, losing energy as it goes. Light absorption in PSI. NADPH formation.
How are photosystems 1 and 2 similar?
What are the Similarities Between Photosystem 1 and Photosystem 2? Both PS I and PS II participate in the light-dependent reactions of photosynthesis. They have two major parts such as antenna complex and reaction centre. Furthermore, they contain photosynthetic pigments that can absorb different wavelengths of sunlight. Also, both are present on the thylakoid membranes of the granna of chloroplasts.