During a biochemical reaction using an enzyme to break apart a substrate, which is true of the moments when the substrate and enzyme are bound together

answer; the correct answer is (beta)

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.