I graduated last july (2006) with a 2:1 MChem chemistry degree, at the time I didn't want to do a phd but now after a year working I miss academia and I'm considering doing a phd. I haven't found one which i like to sound of yet but my main concern is whether I've forgotten too much chemistry to be able to do one! my question is, how much knowledge are you expected to know when starting out in your first year?