Which statement always describes the elementary reaction of a reaction mechanism that is the rate-determining step?
bimolecular
unimolecular
proceeds at the highest rate
proceeds at the lowest rate

I think the answer would be that it proceeds at the lowest rate. The rate-determining step of a reaction mechanism would always be that reaction that has rate that is the slowest. It is from this rate, that other reactions would depend. Hope this helped.

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab.