gcse requirements for chemistry / medicinal chemistry?

just wondering what gcses grades you need to for chem degree (or medicinal not sure yet)
these are my current predicted grades:
english lit - 9
english lang - 8
maths - 8
bio - 9
chem - 9
physics - 8
geo - 9
citizenship - 7/8
statistics - 8
i did few gcses in y10 as well:
arabic - 7
rs - 8
urdu - 8
comp sci - 6 (2 MARKS FROM A 7)
i know these grades aren't bad but i just want to know what you need. i want to go to manchester uni and on the website it says 6s but i feel like realistically you need higher grades cuz a lot of ppl who apply have high grades. for a-levels im hopefully going to do chem, bio, maths and psychology (prob will drop in yr 12)

I think it’s A levels that matter, son did Chemistry, had offer from Manchester ( went elsewhere) his gcse’s in stem subjects similar to you and A levels were maths Chemistry and Physics.