HW #9 - AP Biology Period 4 Liem Nguyen#22...

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AP Biology Period – 4 Liem Nguyen #22 10/11/09 Homework #9 (091016): Chapter 9 (due Friday 091016) Total points: 20 for Attempt on all questions ONE Concept Map: 10 points Objectives The Principles of Energy Harvest 1. In general terms, distinguish between fermentation and cellular respiration. -fermentation: degrades sugars without O 2 -cellular respiration: produces ATP, with O 2 Fermentation is a catabolic process in which partial degradation of sugars occurs without the use of oxygen, and cellular respiration is a catabolic pathway for the production of ATP, in which oxygen is consumed as a reactant along with organic fuel. 2. Write the summary equation for cellular respiration. Write the specific chemical equation for the degradation of glucose. -summary equation: organic compounds + oxygen carbon dioxide + water + energy -chemical equation: C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + Energy (ATP and heat) The equation for cellular respiration is: (organic compounds + oxygen carbon dioxide + water + energy). The specific general equation for degradation of glucose is: [C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + Energy (ATP and heat)]. 3. Define oxidation and reduction. -oxidation: lose e - -reduction: gain e - Oxidation is the loss of electron from one substance, and reduction is the addition of electrons to another substance. 4. Explain in general terms how redox reactions are involved in energy exchanges. -redox reactions: reduced molecules gain e - , oxidized molecules lose e - -reducing agent: accepts e - -oxidizing agent: removes e - Redox reactions are electron transfers, also known as oxidation-reduction reactions. The transfer of electrons changes the energy of substances. 5. Describe the role of NAD + in cellular respiration. -NAD + : acts as electron acceptor (oxidizing agent) during cellular respiration
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NAD + , adenine dinucleotide, acts as an electron acceptor, and functions as an oxidizing agent during cellular respiration. 6. In general terms, explain the role of the electron transport chain in cellular respiration. -electron transport chain (ETC) breaks fall of e - to oxygen into many energy-releasing steps Electron transport chain breaks the fall of electrons to oxygen into several energy- releasing steps instead of one explosive reaction. The Process of Cellular Respiration 7. Name the three stages of cellular respiration and state the region of the eukaryotic cell where each stage occurs. -glycolysis: cytosol -citric acid cycle: mitochondrion -oxidative phosphorylation: mitochondrion Glycolysis occurs in the cytosol, the citric acid cycle occurs in the mitochondrion, and the oxidative phosphorylation: electron transport and chemiosmosis, occurs in the mitochondrion. 8. Describe how the carbon skeleton of glucose changes as it proceeds through
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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 #9 - AP Biology Period 4 Liem Nguyen#22...

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