3.8.3 State that chlorophyll is the main photosynthetic pigment
Role of coherent vibrations in energy transfer and conversion in photosynthetic pigment…
Chlorophyll is the main photosynthetic pigment…
Photosynthesis is responsive to certain wave lengths of light energy (see Fig. 7.3, 7.4 & 7.5, Pg. 110-111 in text). The visible spectrum, from Red to Violet light is effective in photosynthesis The most effective colors of light energy are in the Red and Blue/Violet range of the color spectrum. These are the wavelengths of light that are absorbed most strongly by plant pigments, particularly the PRIMARY (and dominant) pigment in photosynthesis, CHLOROPHYLL a.
The energy conversion/storage process called photosynthesis occurs in autotrophic plants within organelle called chloroplast. This organelle is double membrane bound structure; necessary pigments are concentrated within inner membrane of chloroplast.
Which is the main light-absorbing pigment for photosynthesis
As the electrons in Chlorophyll a are excited and passed between the two photosystems producing ATP, these "electron holes, or "lost" electrons from Chlorophyll a within Photosystem II must be replaced. In that there is no difference between electrons and hydrogen, water will provide a ready source of hydrogen to full these "electron holes". Thus, water molecules are split ("cleaved") and a portion of the hydrogen are used to replace these "lost" electrons. The remainder of the water molecule is recombined to form oxygen--one of the products of photosynthesis, and a specific product of the light Rx.
Pigment associated with Photosystem I is a unique form of Chlorophyll a called P 700. This pigment is excited by wavelengths (colors) of light energy in the FAR RED (just longer than the visible red light) portion of the color spectrum. Electrons from P 700 are picked up by another electron acceptor molecule, and ultimately produces NADPH from NADP+. NADPH is an electron (hydrogen) carrier molecule, which is also used in the DARK Rx in the process of producing glucose. NADPH essentially provides the hydrogen which are part of the glucose molecule. The electrons which are "lost" from P 700 are replaced by the electrons flowing from the electron transport chain linking Photosystem II with Photosystem I.
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In the molecular structure of glucose, C6H12O6, note that the carbon is provided by the CO2 in the Dark Rx. The hydrogen is provided by the NADPH, which is produced in the Light Rx and carried to the Dark Rx; the stored chemical energy as part of the glucose molecule is provided by the ATP (from the Light Rx). The overall photosynthesis process, from start to finish is summarized in the text on page 116 and in Figure 7.10. Be sure to review this material carefully.
Glossary of Terms: P - Physical Geography
photosynthesis notes - Biology Junction
Introduction Chromatography Experiment Title: separation of pigments of photosynthesis using paper chromatography
Photosynthesis (Grades 11-12) - Free Printable Tests …
Goal (main aim): Calculating the Rf of every single pigment, in order …
Chemistry for Biologists: Photosynthesis
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