Question

An extremely important process is called "CARBON FIXATION' What is carbon fixation? This is where plants incorporate CO_2 into organic compounds-the base of our food web This is where plants strip electrons from organic food molecules This is the stage in photosynthesis where glucose appears This is the stage in Calvin cycle where ribulose bisphosphate is regenerated, ready for a new cycle This is where photosynthetic species are eaten, moving their energy into the food web Plants couple tow photosystems (photosystem II and I) by an electron transport chain. The role of H_2O in this process is to... boost the energy of electrons be released as a wasted product be split to provide electrons move across the chloroplast membranes by osmosis Pigments for photosynthesis are in the of chloroplasts stroma outer membrane cristae membranes matrix thylakoid membranes Products of the light reactions of photosynthesis that are sent to the Calvin cycle to make food are ATP and O_2 NADPH and ATP O_2 and CO_2 ATP and H_2O NADPH and H_2O The input molecule for the Calvin cycle reactions of photosynthesis is The organic molecule that exits the Calvin cycle is CO_2; glyceraldehyde 3-phosphate H_2O + CO_2 glucose NADP^+ + ADP; NADPH + ATP CO_2 glucose Lawn grass in an example of a plant that does 'C3' photosynthesis Crab grass does 'C4' photosynthesis. During long dry periods... both plants must close their stomates to retain water. But a C4 plant can still make food with CO_2, provided by a stored C4 compound a C3 plant must close its stomates. but a C4 plant can keep its stomates open to get CO_2 C4 plants can still make food because they can get water from a stored C4 compound D) both plants must close their stomates to retain water. But C4 plants can still make food because the enzyme rubisco can use either CO_2, or O_2, Questions about Cellular Communication: will he posted soon in a separate file. Stay tuned. Frequently asked question: 'Can you provide an answer key ? I do not do that because I want you to try hard on your own like you will on an exam. If you are stumped on a question or two I can help you to realize the answer.

Answer 1

31. A . This is where plants incorporate CO2 into organic compounds. The base of our food Web.

32. C. Split to provide electrons.

33. E. Thylakoid membrane.

34. NADPH and ATP.

35. A. CO2 ; glyceraldehyde 3 phosphate.