OVERVIEW OF PHOTOSYNTHESIS HW 3 4 AUTOTROPHS SUCH

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OVERVIEW OF PHOTOSYNTHESIS HW 3 -4 AUTOTROPHS SUCH AS PLANTS, ALGA, PROTISTS, CYANOBACTERIA AND

OVERVIEW OF PHOTOSYNTHESIS HW 3 -4 AUTOTROPHS SUCH AS PLANTS, ALGA, PROTISTS, CYANOBACTERIA AND PURPLE SULFUR BACTERIA CONVERT LIGHT ENERGY FROM THE SUN INTO STORED CHEMICAL ENERGY Link Photosynthesis overview

Overall photosythesis rxn: 6 CO 2 + 6 H 2 O → C 6

Overall photosythesis rxn: 6 CO 2 + 6 H 2 O → C 6 H 12 O 6 + 6 O 2 § Objective of photosynthesis: Synthesize carbohydrates from CO 2 and H 2 O § Light energy is added to drive rxn

Comparison of Photosynthesis and Aerobic Respiration • Aerobic heterotrophs have only mitochondria whereas photoautotrophs

Comparison of Photosynthesis and Aerobic Respiration • Aerobic heterotrophs have only mitochondria whereas photoautotrophs have both mitochondria and chloroplasts 6 CO 2 + 6 H 2 O + Light energy C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + Energy for life’s work (ATP + heat) Copyright © 2008 Pearson Education, Inc. , publishing as Pearson Benjamin Cummings

Link to mitochondria and chloroplasts

Link to mitochondria and chloroplasts

Figure 10. 2 Focusing in on the location of photosynthesis in a plant STOMATA

Figure 10. 2 Focusing in on the location of photosynthesis in a plant STOMATA = plural of STOMA Link to VA Tech Photosynthesis Animation STOMA : AN OPENING IN THE LEAF FOR EXCHANGING GASES Mesophyll cells contain chloroplasts STROMA – Fluid in chloroplast surrounding Thylakoid membrane; site of Calvin Cycle TEM = Transmission Electron Microscopy

CROSS SECTION OF A CHLOROPLAST STROMA – Fluid in chloroplast surrounding Thylakoid membrane; site

CROSS SECTION OF A CHLOROPLAST STROMA – Fluid in chloroplast surrounding Thylakoid membrane; site of Calvin Cycle THYLAKOID – disc shaped membrane enclosed compartment; site of Light Reactions LAMELLA – connects Granum GRANUM – stack of thylakoids

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 1)

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 2)

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 3)

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the

Figure 10. 4 An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle (Layer 3)