Photosynthesis

Photosynthesis - Biology 111, Principles of Biology Lecture...

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Biology 111, Principles of Biology Lecture Outlines PHOTOSYNTHESIS: In biological systems, energy is made available to do work through the activity of chloroplasts and mitochondria (see Figure 9.2): Photosynthesis General Formula: 6 CO 2 + 6 H 2 O → C 6 H 12 O 6 + 6 O 2 Photosynthesis occurs in the chloroplast, whose structure is organized as a series of internal membrane-bound compartments (see Figure 10.3): Chloroplast Membrane Organization: Enclosed by INNER and OUTER MEMBRANES, which are separated by an INTERMEMBRANE SPACE Internal THYLAKOID MEMBRANES, organized as a series of GRANA (stacks of disk-shaped membrane compartments) Internal cytoplasm known as the STROMA The overall chemical equation for photosynthesis is accomplished through two sets of reactions (see Figure 10.5): LIGHT-DEPENDENT REACTIONS (Light Reactions) occur in the GRANA LIGHT-INDEPENDENT REACTIONS (Calvin Cycle) occur in the STROMA Compare the general equation for photosynthesis with the reactants and products associated with the light-dependent reactions and the Calvin Cycle. NOTE: Water is consumed in the light-dependent reactions Carbon Dioxide is consumed in the Calvin cycle Oxygen is produced in the light-dependent reactions Glucose is produced in the Calvin cycle Light energy is captured by CHLOROPHYLL, a complex pigment molecule found in the thylakoid stacks (grana) of the chloroplasts (see Figure 10.10):
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This note was uploaded on 04/17/2008 for the course BIOL 111 taught by Professor Lux during the Fall '07 term at Lander.

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Photosynthesis - Biology 111, Principles of Biology Lecture...

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