OCR A-Level A Biology June 2018 Paper 3 [Walkthrough and Tutorial] 

this paper is solid wtf im cooked

Watching this while i sleep tonight to osmose the knowledge into my brain

nice move posting all of these before paper 3

is it not taq polymerase used in PCR bc the temp is too high for DNA polymerase

Change those smoke alarm batteries bro 21:12 😂😂

Thank u for this vid! I just wanted to ask that at 4:03 isnt the repressor protein meant to bind to the operator . i read this in the book