HW#10 - AP Biology Period 4 Liem Nguyen#22 Homework#10(091016 Chapter 10(due Friday 091016 Total points 20 for Attempt on all questions ONE Concept

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Liem Nguyen #22 10/11/09 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. An organism acquires organic compounds it uses for energy and carbon skeletons by major modes, called autrophic nutrition and heterotrophic nutrition. Autotrophs are known as producers, or “self-feeders”. Heterotrophs, known as consumers, obtain organic material by eating organisms or conpounds made by other organisms. 2. Distinguish between photoautotrophs and chemoautotrophs. Photoautotrophs use light for energy to make food, while chemoautotrophs use chemical compounds to make food. 3. Describe the structure of a chloroplast, listing all membranes and compartments. Chloroplast is the site of photosynthesis in plants. It has chlorophyll, stomata, stroma, and thylakoids. It also has an inner membrane, an outer membrane, and an intermembrane space. 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. His hypothesis was that plants split water a source of electrons from hydrogen atoms, releasing oxygen as a by-product. It allowed us to understand more about the end of photosynthesis process. 6. In general terms, explain the role of redox reactions in photosynthesis. Redox reactions in photosynthesis reverse the direction of electron flow, splitting water, and transferring electrons along with hydrogen ions from the water to carbon dioxide, reducing it to sugar. 7. Describe the two main stages of photosynthesis in general terms.
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This note was uploaded on 11/06/2011 for the course AP BIO 101 taught by Professor Chan during the Fall '05 term at JFK.

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HW#10 - AP Biology Period 4 Liem Nguyen#22 Homework#10(091016 Chapter 10(due Friday 091016 Total points 20 for Attempt on all questions ONE Concept

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