BB lecture 10-28-09 photosynthesis I

BB lecture 10-28-09 photosynthesis I - Can uncoupling of...

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Unformatted text preview: Can uncoupling of electron transport and ATP synthesis ever be useful to an organism? The answer is probably "Yes." Such uncoupling can generate an energetically wasteful byproduct, heat . This occurs normally in many in hibernating animals, in newborn humans, and in mammals adapted to the cold . It occurs in a specialized tissue known as brown adipose tissue. Calculate the efficiency of aerobic respiration: G for glucose = -686 kcal/mol G for ATP = -7.3 kcal/mol Assume 36 ATP produced from glucose (36) (7.3) = 262.8 kcal/mol 262.8/686 = 0.383 = ~38.3% Chapter 10 (pp. 185-198) Photosynthesis – Part 1 Learning objectives: • Write the summary equation for photosynthesis • Know the significance of photosynthesis in the carbon cycle • Explain the function of accessory pigments • Be able to diagram the photosynthetic light reaction pathways • Be able to diagram cyclic and noncyclic electron flow • Construct a balance sheet for the photosynthetic pathways- List the inputs and outputs of photosystems I and II LIGHT UV Fig. 10-6 The electromagnetic spectrum Visible light Infrared Micro- waves Radio waves X-rays Gamma rays 10 3 m 1 m (10 9 nm) 106 nm 103 nm 1 nm 10–3 nm 10–5 nm 380 450 500 550 600 650 700 750 nm Longer wavelength Lower energy Higher energy Shorter wavelength Figure 10.7 Why leaves are green: chlorophyll pigment Light Reflected Light Chloroplast Absorbed light Granum Transmitted light The thylakoid is the structural unit of photosynthesis. Figure 10.11 Excitation of isolated chlorophyll by lightFigure 10....
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This note was uploaded on 01/20/2010 for the course BIO 50415 taught by Professor Batterton during the Spring '09 term at University of Texas.

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BB lecture 10-28-09 photosynthesis I - Can uncoupling of...

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