http://ibguides.com/biology/notes/enzymes-hl
See 7.6.5 discussion This site should guide you thru other questions, also.
Explain how end product inhibition can control enzyme activity in living cells
2 answers
End product can inhibit an enzyme in a pathway so pathway is ‘switched off ’/cannot take place
so concentration of end product decreases
as it is used up by the cell
as concentration decreases, inhibition of enzyme decreases enzyme becomes active and pathway active again
so concentration of end product decreases
as it is used up by the cell
as concentration decreases, inhibition of enzyme decreases enzyme becomes active and pathway active again