What is AQA Science?

[messi10]

I know that AQA is same as GCSE.
But in IGCSE we have biology, chemistry and physics..

What does it mean by AQA Science?
Is it Science A and B? Do we have to study both A and B in AQA Science?

Ref:
http://www.aqa.org.uk/subjects/science/gcse/science-a-4405
http://www.aqa.org.uk/subjects/science/gcse/science-b-4500


Also, Is it my choice that if I take AQA science OR AQA biology, chemistry, physics alone?

I'll appreciate your guidance on that, as much as possible.
Sincere regards

 

[Joeytheking]

It's a UK exam board. You can take each science individually like you can in IGCSE