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- 10. Observe the graph on the right. If you had a hypothetical plant that only had a hypothetical photopigment with an absorption maximum at 585, which color light would produce the highest rate of photosynthesis? ltra Violet Blue 456-492 nm Green 492677 nm Yellow Orange 597-620 nm Red intra vielet red 400-455 nm 677-697 nm 620-700 nm nm 400 500 600 700 short wtength Ieng vetength high fmuency lawhumcy1. What is it difficult for most plants to carry out photosynthesis in very hot, dry environment such as deserts?2. If a plant was deficient in nitrogen, name which complexes, molecules, and/or parts of the light harvesting and photosynthetic apparatus you think will be affected and explain why
- 8. Most plants open their stomata during the day when light is available for photosynthesis to favor CO2 diffusion and then close them at night to conserve water. However, plants such as the saguaro cactus (pictured) actually open their stomata at night to fix carbon and undergo alternative photosynthetic reactions during the day instead of capturing sunlight for light- dependent reactions. This is an adaptation to conserve water in desert climates. With this in mind... a. Do you think the air and soil surrounding the cactus is typically drier or wetter than the plant? b. How would soil moisture impact water transport in the plant? c. Why do you think cacti lack large green leaves found in plants that undergo more traditional forms of photosynthesis?7.Draw the action spectrum of photosynthesis and the absorption spectrum of chlorophyll on the axes below: % use of absorbed light 100 1 50 25 chloro chlorophyll phyll a 400 baction spectrum 500 absorption spectrum 600 wavelength of light (nm) 700 800 100 5 50 25 % absorption of light 8.Make a note on the above diagram (Q=7) to explain why most leaves look green.1. What is the equation for photosynthesis? Label the reactants and the products. 2. What structure in the leaf allows for gas exchange? How are these structures regulated? 3. What factors, if any, do you think may affect the rate of photosynthesis?
- 1. What colour of lights is the least effective in driving photosynthesis? Why?1.The shorter the wavelength of visible light the Group of answer choices a, more photons it contains b, less energy absorbed by photosynthetic pigments c, reener the color d, greater the energy 2. The reason we breathe in oxygen is to assist in the production of Group of answer choices a, cell structures b, ATP c, Glucose d, Nitrogen 3. Why does a plant use the CAM or C4 pathway during photosynthesis? Group of answer choices a, To bind carbon dioxide and not use the C3 pathway in photosynthesis b, To bind Carbon dioxide to use later in the C3 pathway when carbon dioxide levels are low due to closed stomata c, Plants that use C4 and CAM do not do photosynthesis d, To use in the process of cell respiration when stomata are closed18. What is the primary function of the light reactions of photosynthesis? Group of answer choices to produce ATP and NADPH to convert light energy to the chemical energy of PGAL to produce energy-rich glucose from carbon dioxide and water to use ATP to make glucose
- 1. During the light dependent reaction, the molecules within the membrane absorb light energy 2. high energy compounds light dependent portion of photosynthesis 3. an electron which is released by a process called and are produced in the in the thylakoid enters where it is energized and used to convert energy. 4. protons travel through located in the thylakoid membrane in a high energy compound. a process known as 5. The three stages of the light independent reaction are to produce and 6. The most abundant protein on earth is 7. You would need molecules of RuBp in order to create 1 molecule of glucose1.Which of the following best describes how light energy is "captured" during the process of photosynthesis? a. The correct photon of light "excites" an electron in a chlorophyll molecule. b. Light heats up the stroma in the center of the chloroplast which causes enzymes to convert CO2 into glucose. c. Photons of light cause H+ to move through the thylakoid membrane, creating a hydrogen ion gradient. 2. What best explains what happens to the electrons that are excited out of chlorophyll molecules during the process of photosynthesis? a.They are pumped across the thylakoid membrane in the ETC of photosynthesis. b. They cause electrons in NADPH to get "excited" and form new bonds in ATP. c. They are captured and move through an ETC, creating ATP and ultimately being captured by NADPH. d. They fall back into the chlorophyll molecule, emitting ATP as they fall.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.