Question

Explain how chemiosmotic phosphorylation functions in chemoautotrophy. Give three examples of reductant-oxidant pairs that fuel chemiosmosis in chemoautotrophic prokaryotes. Is chemoautotrophy aerobic, anaerobic, or both?

Explain how chemi-osmotic phosphorylation functions in chemoheterotrophy. Give three examples of reductant-oxidant pairs that fuel chemiosmosis in chemoheterotrophic prokaryotes. Is chemoheterotrophy aerobic, anaerobic, or both?

Answer 1

chemiosmotic phosphorylation functions in chemoautotrophy,

chemiosmotic phosphorylation is part of oxidative phosphorylation along with electron chain. An energy coupling mechanism has been occured in this process. Is a aerobic condition.

Example:

Iron Bacteria, Archaea, Nitrosomonas.

chemi-osmotic phosphorylation functions in chemoheterotrophy,

chemoheterotrophs oxidize(take eletrons from) organic molecules and reduce an electron carrier molecule called NAD+ that accepts electron from food to become NADH. Is a aerobic and anaerobic condition.

Example:

animals and fugus.

Autotrophs:

autotrophs synthesize organic substance from inorganic energy such as hydrogen sulfide, elemental sulfur, ferrous iron, molecular hydrogen and ammonia.

Hetrotrophs:

Do not synthesize organic substances (obtain energy from already synthesized organic substance)

Types	Energy Source	Carbon Source
Chemo - Auto	Inorganic compounds	Inorganic Carbon compounds
Chemo -Hetero	Organic compounds	Organic compounds

chemiosmotic phosphorylation