Use your model and the information in Chapter 10 of Biology, 7th edition, to answer the questions.1. The various reactions in photosynthesis are spatially segregated from each other within the chloroplast. Draw a simplified diagram of a chloroplast and include these parts: outer membrane, grana, thylakoid, lumen, stroma/matrix. Refer to Figure 10.3, page 183, in Biology,7th edition. a. Where in the chloroplast do the light reactions occur? In the thylakoid membranesb. Where in the chloroplast is the chemiosmotic gradient developed? Across the thylakoid membrane; H+ions are pumped into the thylakoid spacec. Where in the chloroplast does the Calvin cycle occur ? In the stroma or liquid portion of the chloroplast2. In photosynthesis, the reduction of carbon dioxide to form glucose is carried out in a controlled series of reactions. In general, each step or reaction in the sequence requires the input of energy. The sun is the ultimate source of this energy. a. What is/are the overall function(s) of photosystem I? b. What is/are the overall function(s) of photosystem II? c. What is/are the overall function(s) of the Calvin cycle? In noncyclic photosphosphorylation, photosystem I produces NADPH. In cyclic photophosphorylation, photosystem I produces ATP. Photosystem II generates ATP. To fill the electron hole in photosystem II, water is split into 2 H+, 2e−, and 1/2O2. (The electron from photosystem II fills the electron hole in photosystem I.)The Calvin cycle uses the ATP and NADPH generated in the light reactions to reduce CO2to three-carbon compounds in a cyclic series of reactions that regenerates the original five-carbon sugar required to accept the CO2. The three-carbon compounds can be used to make glucose or other organic compounds required by the cells.
worksheet Photosynthesis Virtual Labs Name: Melina Franco Date: April 12, 2016 Watch and listen to Photosynthesis introductions. Fill in the following answers as you watch. Stop and replay anything you don’t understand – this is a complicated topic! 1. Plants use photosynthesis to store chemical energy, and they use cellular respiration to harvest energy for the plant. 2. What do plants need in order to perform photosynthesis? Plants need water, carbon dioxide and light energy to perform photosynthesis. 3. How is the plant able to obtain each “ingredient?” Plants obtain the water through their roots, the roots have a certain type of cell that grow out from root to soil and the roots having a thin wall allow water to pass easily. Plants obtain carbon dioxide through their leaves, it spreads through the stomata. Plants obtain their energy through their leaves as well and they use that energy to change the other two ingredients into glucose. 4. Identify the plant cell organelle in which photosynthesis takes place. Chloroplast is the organelle of a plant that contains a pigment called chlorophyll. This chlorophyll absorbs the energy from sunlight and utilize this energy to synthesize food from carbon dioxide and water. Therefore,