Chapter 8. Microbial metabolism - metabolism : “metaballein” = change - microbial metabolism : all chemical changes occurring in a microbe during its growth and development for healthy and stable maintenance and development for healthy and stable maintenance - occurring for activities such as movement, growth, synthesis, foodstuff, reproduction -> highly organized and responsive to cellular control in its local environment -> rxn of metabolism are used efficiently, economically Light energy Chemical energy Light energy Photolithoautotroph Chemolithoautotroph Chemical energy CO 2 Chemolithoautotroph CH 2 O energy works microbes Chemoorganoheterotroph (energy, biosynthesis)
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Chapter 8. Microbial metabolism
- metabolism : “metaballein” = change
- microbial metabolism : all chemical changes occurring in a microbe during its growth
and development for healthy and stable maintenanceand development for healthy and stable maintenance
- occurring for activities such as movement, growth, synthesis, foodstuff, reproduction
-> highly organized and responsive to cellular control in its local environment
-> rxn of metabolism are used efficiently, economically
Light energy Chemical energyLight energy
PhotolithoautotrophChemolithoautotroph
Chemical energy
CO2Chemolithoautotroph
CH2Oenergy worksmicrobes
Chemoorganoheterotroph(energy, biosynthesis)
Chapter 8. Microbial metabolism
1. Enzyme
- all metabolic rxns are catalyzed and regulated by enzyme- enzyme : organic molecules, catalysts
-> catalyst : speed up the rxn without being chemically transformed by itself
* Enzyme reaction
Chapter 8. Microbial metabolism* Enzyme reaction
- enzyme provide a site for substrate binding -> active site- enzyme-substrate complex is formed at transition state- end products is released
Chapter 8. Microbial metabolism
☞ enzyme-substrate complex
2. Energy
Chapter 8. Microbial metabolism2. Energy
- major goal of metabolism :
-> supply energy-storing substances and release when needed
(photosynthesis) vs (respiration)
- ATP : energy carrier molecule
-> adenosine triphosphate
-> universal energy currency
l l ( l l )
Chapter 8. Microbial metabolism
3. Glycolysis (glyco + lysis)
- primary central pathway for all living organisms
- starts from six-carbon organic molecule glucose- starts from six-carbon organic molecule, glucose
- produce three-carbon molecule, pyruvate, as end product
- pyruvate is utilized for three different destination
take place in the cytoplasm of microbes- take place in the cytoplasm of microbes
- not require oxygen
- catalyzed by enzymes
2 l l f ATP i t d d 4 ATP d d- 2 molecules of ATP are invested and 4 ATP are produced