1 / 20

Respiration

Respiration. Cell respiration : all organisms respire, it is the production of ATP from organic molecules. Production of ATP. Organic molecules contain energy in their molecular structure

paiva
Download Presentation

Respiration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Respiration Cellrespiration: allorganisms respire, itistheproduction of ATPfromorganicmolecules

  2. Production of ATP • Organicmoleculescontainenergyin their molecular structure • Eachcovalent bond in a glucose, amino acid and fattyacidrepresentsstoredchemicalenergy • Burningistheuncontrolledrelease of chemicalenergycalledrapidoxidation • Enzymescatalyze a sequence of reactionswherecovalentbonds are brokenone at a time (controlledoxidation). • Ultimategoalof a controlledoxidationistotrapthereleaseenergy in form of ATP.

  3. Glycolysis: Firststep. Allcellsbeginthecellrespiration in thesameway. Cytoplasm 2 ATP 2 ADP 4 ADP 4 ATP Net gain of ATP = 2

  4. Aerobic cellrespiration

  5. Link reaction: Secondstep.Itoccurs in thematrix of themitochondrion. Matrix

  6. Kreb´scycle: Thirdstep. Uses oxygento produce ATP. Itoccurs in thematrix of themitochondrion Acetyl- CoA Kreb´scycle CO2 Electronchainreaction 32 molecules of ATP!! O2 H2O

  7. Anaerobiccellrespiration • Glycolysisisthefirststep. • Itdoesnot use oxygen • Itisalsocalledfermentation (alcoholic and lacticacidfermentation) • Alcoholicmadebyyeast (single-celledfungus) • Lacticacidhumans

  8. Alcoholicfermentation: (Important in differentindustries…) Ethanol CO2 Net gain of ATP = 2

  9. Lacticacidfermentation:Humans Lactate (Reaction reversible when O2 available) Net gain of ATP = 2

  10. Summary

More Related