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Hrincevich_CH_7_student_outline - How Cells Acquire Energy...

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How Cells Acquire Energy Chapter 7
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Photoautotrophs Carbon source is CO2 Energy Source is light Heterotrophs Can’t produce Carbon and Energy Sources
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Photoautotrophs Plants Some bacteria Most protistans
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Englemann’s Experiment Certain bacteria cells will move toward places where oxygen concentration is high Photosynthesis produces oxygen as a byproduct
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Englemann’s Experiment
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Photosynthesis and Cellular Respiration are Linked Processes Photosynthesis Energy-storing pathway Releases oxygen Requires CO2 Aerobic Respiration Energy-releasing pathway Requires oxygen Releases CO2
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Photosynthesis and Cellular Respiration are Linked Processes
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Leaf Anatomy Flattened leaf shape exposes large surface area to catch sunlight Upper and lower leaf surfaces of a leaf compromise the epidermis Waxy, waterproof cuticle on outer surfaces reduces water evaporation
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Leaf Anatomy Adjustable pores called stomata allow for entry of air w/ CO2 Inner mesophyll cell layers contain majority of chloroplasts Vascular bundles (veins) supply water and minerals to the leaf while carrying sugars away from the leaf
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Leaf Anatomy
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Anatomy of a Chloroplast Mesophyll cells have 40-200 chloroplasts each Chlorplasts are bounded by a double outer membrane composed of the inner and outer membranes The stroma is the semi-fluid medium within the inner membrane Disk shaped sacs called thylakoids found within the stroma in grana
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Anatomy of a Chloroplast
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Anatomy of a Chloroplast Stroma: fluid within chloroplast Thylakoid : one of the sacs within a chloroplast; chlorophyll is built into the thylakoid membranes Granum : a stack of thylakoids within a chloroplast; “stack of pennies” picture
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Photosynthesis Equation 12H2O + 6CO2 6O2 + C6H12O6 + 6H2O LIGHT ENERGY
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Where Atoms End Up 6O2 C6H12O 6 6H2 O 12H2 O 6CO2
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Two Stages of Photosynthesis P LIGHT- DEPENDENT REACTIONS LIGHT- INDEPENDENT REACTIONS (DARK REACTIONS) Sunlight Water CO2 Uptake ADP NADPH Glucose
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The Energy in Visible Light Sunlight radiates electromagnetic energy Visible light is radiation falling between 400-750 nanometers of wavelength
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This document was uploaded on 10/26/2011 for the course BIOL 1001 at LSU.

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Hrincevich_CH_7_student_outline - How Cells Acquire Energy...

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