Practise your skills with these exam-style combined science questions based on GCSE past papers. Or take our combined science topics exam practice quiz which lets you choose the topic you want to ...

Here you can find CCEA past papers for GCSE Chemistry (Single Science). Use the links below to download question papers and mark schemes (which contain the answers). If you’re unsure whether you need ...

Apr. 7, 2026 A gene called KLF5 may be a key force behind the spread of pancreatic cancer—but not in the way scientists expected. Rather than mutating DNA, it rewires how genes are turned on and off, ...

Quantum chemistry applies quantum mechanics to the theoretical study of chemical systems. It aims, in principle, to solve the Schrödinger equation for the system under scrutiny; however, its ...