B1510_F07_metabolic_evolution_diversity

B1510_F07_metabolic_evolution_diversity - Georgia Tech...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology 1510 Georgia Tech School of Biology Fall 2007 Evolution & Diversity of Energy Metabolism What were the first metabolic pathways that evolved in the first cells or proto-cells? How can life flourish in the absence of oxygen or light? What is the diversity of microbial energy metabolism?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Biology 1510 Georgia Tech School of Biology Fall 2007 Q: An organism that fixes CO 2 , lives deep in a cave, and oxidizes ammonia for energy would be: a) A chemoheterotroph b) A photoheterotroph c) A chemoautotroph d) A photoautotroph
Background image of page 2
Biology 1510 Georgia Tech School of Biology Fall 2007 What pathways were present in the last universal common ancestor? Electron transport chain & chemiosmotic ATP synthesis:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Biology 1510 Georgia Tech School of Biology Fall 2007 Q: What may have been the energy source for the first cells or proto-cells? a) Sunlight-excited pigment molecules as electron donor, oxygen as electron acceptor b) Organic chemicals as electron donor, oxygen as electron acceptor c) Sunlight-excited pigment molecules as electron donor, oxidized pigment molecules as electron acceptor d) Inorganic chemicals as electron donor, minerals as electron acceptor
Background image of page 4
Georgia Tech School of Biology Fall 2007 Chemoautotrophic Pathways Reaction Name* C Pathway Aerobic Ammonia oxidation NH 4 + + 2O 2 NO 3 - + 2H + + H 2 O Calvin Methane oxidation CH 4 + 2O 2 CO 2 + 2H 2 O RMP Mn Oxidation 2Mn 2+ + O 2 + 2H 2 O 2MnO 2 + 4H + Calvin Fe Oxidation 2Fe 2+ + O 2 + 10H 2 O 4Fe(OH) 3 + 8H + Calvin Sulfide Oxidation H 2 S + 2O 2 SO 4 2- + 2H + R-TCA, Calvin H Oxidation 2H 2 + O 2 2H 2 O R-TCA, Calvin Anaerobic Denitrification 2NO 3 - + 5H 2 N 2 + 4H 2 O + 2OH - Calvin, A-CoA Fe Reduction 2FeOOH + 4H + + H 2 Fe 2+ + 4H 2 O Calvin Sulfate Reduction SO 4 2- + 4H 2 + 2H + H 2 S + 4H 2 O A-CoA Methanogenesis CO 2 + 4H 2 CH 4 + 2H 2 O A-CoA
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2008 for the course BIO 1510 taught by Professor Unknown during the Fall '07 term at Georgia Tech.

Page1 / 21

B1510_F07_metabolic_evolution_diversity - Georgia Tech...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online