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- Which of the following is a correct step in the light-dependent reactions of the Z system? a. Light is absorbed at P700, and electrons flow through a pathway to NADP+, the final acceptor of the linear pathway. b. Electrons flow from photosystem II to water. c. NADP+ is oxidized to NADPH as it accepts electrons. d. Water is degraded to activate P680. e. Electrons pass through a thylakoid membrane to create energy to pump H+ through the cytochrome complex.using a 14CO2 fixation assimilation method,a plant is found to be fixing carbon at a rate of 140mgh-1 .dm-2 leaf area in the sunlight. In darkness the same plant is losing 30mgh-1.dm-2 . Calculate the photosynthetic capacity of the plant and state with reasons to which photosynthetic type the plant belongsWhich of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correct
- Which of the following statements is FALSE? Group of answer choices: - Plastoquinone has a higher reduction potential than plastocyanin. - Water is the ultimate electron donor. - Proton gradient is created in the light phase of photosynthesis wherein the pH in the stroma is higher than in the lumen. - Photosystem II has chlorophylls in its reaction center that has maximum light absorption at 680 nm.Discuss whether it would be more beneficial to improve the light or dark reactions in order to enhance photosynthesis for a future scenario of extreme drought conditions. Please draw sketches to illustrate and include atleast 20 pointsFor which kind of plant, and in which condition, would you expect to find leaves with the highest SLA (Specific Leaf Area)? Selected Answer: a shade-Intolerant plant growing in sun Answers: a shade-tolerant plant growing in shade a shade-tolerant plant growing in sun a shade-intolerant plant growing in sun a shade-intolerant plant growing in shade
- You will create a slide show/ Canva/ Website on the flow chart of photosynthesis phases .Your poster should include, but is not limited to:○ The overall equation is at the top.○ A diagram of a chloroplast which indicates where each reactant is used and whereeach product is synthesized. ○ All intermediary steps were studied in the light-dependent reactions and light-independent reactions, in the form of a flow chart(try to add details around them), using appropriate terminology. ● You will also submit a detailed explanation of your flow chart, using appropriateterminology.The figure shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different? 400 500 600 700 Wavelength of light (nm) O Green and yellow wavelengths inhibit the absorption of red and blue wavelengths. O Oxygen given off during photosynthesis interferes with the absorption of light. O Other pigments absorb light in addition to chlorophyll a. Absorbance of chlorophyll a Violet Blue Green Yellow Orange Red - Rate of photosynthesisMagaia et al. illustrated in Figure 2 the relationship of photosynthetic of temperature rate and respiration rate of C3 plants as a function (2015). Which process hampers the carbohydrate synthesis when the temperature exceeds 30°C? respiration photosynthesis 0 10 40 50 20 30 temperature C Figure 2. Relationship of photosynthetic rate and respiration rate in response to temperature. Ⓒ Magaia et al., 2015 O a. Light-dependent reaction O b. Light-independent reaction O c. Photorespiration O d. Photolysis of water rate
- For photosynthesis lab in biology 1) This lab uses spinach leaves. Name another plant that would make an interesting comparison to spinach. Explain why you think this leaf would provide an interesting comparison 2) The lights used in this experiment are 60W. What would you predict the effect of having stronger or weaker wattage bulbs would be on your results? Explain. 3)This lab uses 0.2% sodium bicarbonate. What would you predict the effect of raising or lowering the percentage would be on your results? Explain. 4)What are TWO other things that might be manipulated in an experiment using this same protocol other than the type of leaf, percent sodium bicarbonate, and wattage of light bulb? 5) What key thing do you have to look for on the graph to know for certain that your treatment has caused a significant effect?A group of scientists wants to test the effect of different wavelengths of light on plant photosynthesis. They have 3 treatment groups: red light, green light, and no light. They choose red light because chlorophyll has been shown to absorb red light. They choose green light because chlorophyll has been shown to reflect green light. They choose no light as a negative control to examine the rate of photosynthesis in the absence of light. To measure photosynthetic rate, the scientists use sensors to measure oxygen production of plants exposed to the different light treatments. Choose the best scientific hypothesis: O Photosynthesis is a critical process for plants, and it is of great importance that we understand how it is impacted by different wavelengths of light. O If rate of oxygen production is higher under red light than it is under green light or no light, it proves that red light has the largest effect on photosynthesis. O Because chlorophyll absorbs red light, rate of oxygen…Despite the enormous amount of solar energy that plants are exposed to, photosynthesis is only able to transform about 1% to2% of that energy into stored chemical energy. Explain 1 factor responsible for this phenomenon and detail how it contributes to this inefficiency.
