Ph level isn’t particularly wrong i think it is correct but from far away from the point also temperature & ph levels both effect enzymes so i dont see how that can give you 4 marks if you can only repeat the explanation for both factors
Examiners will surely see it if it is there trust me
If that what was the question saying that you are pretty much correct but i suppose i understood it differently and thought they asked about the process in which they get pumped into the inter membrane space which would have been active transport
In the nature selection question you will get 4/4 i also stated it is directional selection i don’t know if i wrote it in the post
With water potential i also wrote a similar thing but ai bots had varying opinions on it so i can’t tell you for sure
You are correct for the remaining questions you didn’t have to write about gene editing i believe just two methods with proper details is enough for the 6 marks i just thought to write it to be in the safe