what subjects did you have to study for your PHD?

Question: what subjects did you have to study for your PHD?
- Keywords:
  education,
  study,
  subject
Asked by anon-196552 to Paddy on 6 Mar 2019.
- Paddy Sudhakar answered on 6 Mar 2019:
  
  We during my PhD, it was pure research with no courses. But prior to the PhD, I did my Masters which included several subjects such as chemical engineering, bioreactors and biosystems, environmental microbiology, industrial microbiology, systems biology etc.

Question: what subjects did you have to study for your PHD?