It could be along the lines of .......
Why a Physician associate and not a doctor/nurse?
Why this university?
What would you do if a patient was ......... violent/scared/crying/shouting/running around naked?
How would you deal with a friend/neighbor/member of the public who needed help after an illness/operation?
If needed to work more would you prioritise work or family?
There are a few medical school question banks online that may be helpful and also a UK Physician associate applicants facebook group where a lot of members are happy to give advise & sometimes mock interviews.
They are looking for honesty & empathy - not medical knowledge.
You should be told what qualities they are looking for in your interview.
What university are you interviewing for? Is it MMI or Pannel? All the interviewers I have had have been friendly and will put you at ease - however, I know how nervous I was before mine so I sympathise.
Good luck & let us know how you get on!