Hi guys! I'm italian. I want to do a phd in molecular biology in UK. I'm graduated in biological sciences with the maximum voting. My problem is that I don't speak english very well, specially listening. Now I'm attending english school. Are IELTS or TOEFL certificates indispensable to get a phd? Is informal requiry good? Have I good possibilities to get a phd? What do you advise me to do? Thanks.