Do microbes that use molecular oxygen (aerobes) produce more or less energy from nutrients than microbes that do not use oxygen (anaerobes)?
Aerobes = MORE energy
Final electron acceptor in anaerobic respiration
An inorganic substance other than oxygen such as nitrate ion, sulfate, carbonate.
Only part of Krebs cycle operates under anaerobic conditions. Not all carriers in the electron transport chain participate in anaerobic respiration. ATP yield is never as high as in aerobic respiration. Anaerobes tend to grow more slowly than aerobes.,
Any metabolic process that releases energy from a sugar or other organic molecule, does not require oxygen or an electron transport system, and uses an organic molecule as the final electron acceptor. Produces only small amounts of ATP.
Microorganisms synthesize sugars and polysaccharides. For example, glucose can be synthesized and used to make glycogen. This process costs ATP, but glycogen can be a stored form of energy for later use.
Cells synthesize fats by joining glycerol and fatty acids. Glycerol is derived from an intermediate formed during glycolysis. Fatty acids are derived from acetyl CoA.
Amino acid and protein biosynthesis
E. coli contains the enzymes necessary to use starting materials, such as glucose and inorganic salts, for the synthesis of all the amino acids they need. Many precursors for amino acids synthesis come from the Krebs cycle.
Purine and pyrimidine biosynthesis
The 5-carbon sugars of nucleotides are derived from either the pentose phosphate pathway or the Enter-Doudoroff pathway.
The integration of metabolism
Anabolic and catabolic reactions are joined through a group of common intermediates.
Organisms that use an inorganic chemical as an energy source an CO2 as a carbon source.
The Krebs Cycle
A series of chemical reactions in which NADH is produced from the oxidation of pyruvic acid.
In aerobic respiration, what is the fate of the pyruvic acid produced in glycolysis?
It is oxidized in the Krebs cycle