What part of the cell does the electron transport chain take place?

a. golgi apparatus b. mitochondria c. nucleolus d. endoplasmic reticulum

Mitochondria.

Explanation: The electron transport chains is a process that is used for extracting energy by oxidation of NADH and FADH molecules produced during Glycolysis and Kreb's Cycle.

Energy released during ETC is used for the formation of ATP molecules.The ETC takes place in the inner mitochondrial membrane in Eukaryotes.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.