APBIOHW 10 - AP Biology Period 4 Amit Patel #19 1/11/11...

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AP Biology Period – 4 Amit Patel #19 1/11/11 Homework #10 (091016): Chapter 10 (due Friday 091016) Total points: 20 for Attempt on all questions ONE Concept Map: 10 points Objectives The Process That Feeds the Biosphere 1. Distinguish between autotrophic and heterotrophic nutrition. Autotrophic and heterotrophic nutrition describe how organisms get energy and carbon skeletons.Autotrophs make their nutrients and energy using resources provided by their environment. Heterotrophs acquire nutrients and energy from other organisms ( in some cases also the environment). -heterotrophs -acquire nutrients -from other organisms -autotrophs -produce own nutrients and energy 2. Distinguish between photoautotrophs and chemoautotrophs. Photoautotrophs use light energy to create food and chemoautotrophs use chemical energy to make food. -chemical energy -light energy 3. Describe the structure of a chloroplast, listing all membranes and compartments. The chloroplast is the site of photosynthesis in plants it has an inner membrane, an outer membrane, and an intermembrane space. It has thylakoids stacked into granum with stroma around that and stomata to release O2 and H2O. -thylakoids -granum -stomata -intermembrane space -outer membrane -stroma The Pathways of Photosynthesis 4. Write a summary equation for photosynthesis. 6CO 2 + 12 H 2 O + Light Energy C 6 H 12 O 6 + 6 O 2 + 6 H 2 O 5. Explain van Niel's hypothesis and describe how it contributed to our current understanding of photosynthesis. Explain the evidence that supported his hypothesis. The hypothesis was that plants split water as a source of electrons, releasing oxygen as a
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by-product. It allows us to understand more about the end of photosynthesis process, the evidence comes from the fact that oxygen is a byproduct of photosynthesis and the oxygen from water has to go into it in order to balance the reaction. -water split -O2 byproduct -balances reaction 6. In general terms, explain the role of redox reactions in photosynthesis. Redox reactions in photosynthesis take electrons from the hydrogen atoms of water and
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This note was uploaded on 01/04/2012 for the course BIOL 701 taught by Professor Chan during the Spring '11 term at Georgia Institute of Technology.

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APBIOHW 10 - AP Biology Period 4 Amit Patel #19 1/11/11...

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