what is the first complex produce in this electron transport chain?
NADH-coenzyme Q oxidoreductase
Oxidative phosphorylation
NADH-coenzyme Q oxidoreductase, also known as "NADH dehydrogenase" or "complex I", is the first protein in the electron transport chain
is the electron transport chain part of oxidative phosphorylation Yes. It is the metabolic pathway in which cells use enzymes to oxidize nutrients, thereby releasing the chemical energy stored within in order to produce adenosine triphosphate (ATP) how is it related to chemiosmosis? When  the electron transport chain and the ATP synthase are embedded in a membrane, and energy is transferred from the electron transport chain to the ATP synthase by movements of protons across this membrane, in a process called "chemiosmosis in eukaryotes, where this process or pathway takes place? Inner membrane of the mitochondrion
wiki:25676167
Oxidative phosphorylation [SEP] NADH-coenzyme Q oxidoreductase (complex I)
NADH-coenzyme Q oxidoreductase, also known as "NADH dehydrogenase" or "complex I", is the first protein in the electron transport chain. Complex I is a giant enzyme with the mammalian complex I having 46 subunits and a molecular mass of about 1,000 kilodaltons (kDa). The structure is known in detail only from a bacterium; in most organisms the complex resembles a boot with a large "ball" poking out from the membrane into the mitochondrion. The genes that encode the individual proteins are contained in both the cell nucleus and the mitochondrial genome, as is the case for many enzymes present in the mitochondrion.