HIST 102 Chapter : Key Terms
Document Summary
It is a somewhat inefficient process because much of the cellular energy remains in the two molecules of pyruvic acid. Eight steps, each catalyzed by a specific enzyme: the acetyl group of acetyl coa joins the cycle by combining with oxaloacetate, forming citrate, the next seven steps decompose the citrate back to oxaloacetate, making the process a cycle. Electron transport chain: (generates no atp directly, breaks large free-energy drop from food to o2 into smaller steps that release energy in manageable amounts) Nadh or fadh2 pass the electrons to the electron transport chain. Electrons are passed through a number of proteins including cytochromes (each with an iron atom) to o2. O2 pulls electrons down the chain in an energy-yielding tumble. The energy yielded is used to regenerate atp. It accounts for the transfer of six protons across the membrane. Each fadh2 molecule accounts for the transfer of four protons.
