Suppose there were plants that had a high concentration of Chlorophyll-b, but lacked chlorophyll-a, would it carry out photosynthesis? Then why do plants have chlorophyll-b and other accessory pigments?
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- Suppose there were plants that had a high concentration of Chlorophyll b, but lacked chlorophyll a, would it carry out photosynthesis? Then why do plants have chlorophyll b and other accessory pigments?What is so special about thylakoid membranes (and chloroplasts in general) that allow it to be the site for photosynthetic activity in plants?For most plants, two distinct photosystems (Photosystem I and Photosystem II) work together in series during photosynthesis. These photosystems are complexes of proteins and pigment molecules. Statement 1: Photosystem I has an absorption maximum of 680 nm, whereas Photosystem II has an absorption maximum of 700 nm. Statement 2: The special pair of chlorophyll a molecules in the reaction center of photosystem I is designated as P700, whereas the special pair of chlorophyll a molecules in the reaction center of photosystem II is designated as P680. Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false.
- All plants contain chlorophyll a. In addition, many plants contain other types of chlorophylls and accessory pigments. Suppose a new agricultural technology is developed in which accessory pigments are somehow embedded or injected into crops that naturally have only chlorophyll a. Explain the food production advantage that these plants could hypothetically provide if they could utilize many of these pigments rather than just one type of chlorophyllIn the photosynthesis lab, a group of students found that in the blue light condition, there was a change in absorbance (ΔA620) of 0.324 in extracted spinach chloroplasts. The students later went on a hike and located a plant they had never seen before and were interested in how the photosynthesis rates would compare to their experiment with spinach chloroplasts. They extracted chloroplasts of the unknown green-leaved plant and exposed them to the same experimental conditions as before. The students calculated the ΔA620 to be 0.100. Which plant (spinach or unknown) has the highest rate of photosynthesis? Explain your answer using evidence, being sure to demonstrate your understanding of the dependent variable.As energy passes from blue-absorbing chlorophylls down to red-absorbing chlorophylls, surprisingly, no energy passes from lower energy-absorbing pigments back to higher ones (in other words, the process is irreversible). Why might that be?
- The distinctly blue shade of a blue spruce results from the scattering of light by small waxy particles that coat the leaves. Explain how this scattering can protect the leaves from damage by short-wavelength ultraviolet light while still permitting the passage of longer wavelengths of light for photosynthesis.What enzyme fixes CO2 in the cytosol of a mesophyll cell in a C4 plants? Why is the C4 photosynthesis called C4 photosynthesis?Can you please describe the process of photosynthesis along with the equations? Also please explain what is chorophyll?
- What are the molecules produced from the light-dependent reactions of oxygenic photosynthesis in plants and why are they necessary for the plant?Not all plants have leaves that are green. Zebrina sp. has purple leaves. However, these plants are still photoautotrophic and so contain all of the expected components of photosynthesis. Explain how it is possible that these leaves are purple and can photosynthesize when you know that the photosynthetic pigment chlorophyll causes leaves to look green yet these are purple and not given.If you landed on a planet where all of the plants had purple leaves, what wavelengths of light would you expect to be least effective for photosynthesis? explain your reasoning.