What is the electron transport chain? breakdown of glucose to pyruvate synthesis of glucose from noncarbohydrate sources formation of excess ketone bodies electrons tranferred back and forth to make atp

Electrons transferred back and forth to make ATP

Explanation:

Electron transport chain includes a set of proteins involved in the transfer of electrons to generate a proton chemical gradient. The energy of the proton chemical gradient is then used to drive the endergonic process of formation of ATP by phosphorylation of ADP.

Example: transfer of electrons from NADH and FADH2 through electron transport chain of inner mitochondrial membrane to the terminal electron acceptor oxygen generates a proton chemical gradient that drives ATP synthesis.  

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.