Lots of multiple choice quizzes here for GCSE biology (not specific syllabus, use the ones that fit!). Site is mobile friendly. Good for quick checks of topics that you have revised, quizzes give useful feedback and there are also flashcards and links to other resources.
Plants’ epigenetic secrets
Article from The Scientist on plant epigenetics and inheritance of DNA methylation. Interesting background reading, goes into more detail than you need.
How to not be annoying
WikiHow article with points on “How to not be annoying”. Would make an interesting introduction to a year 7 PSHE or form session on getting along with each other.
A to Z list of animals with information, diagrams about each one. At the right sort of level for doing some research on different animals for a project or homework on classification or adaptation.
Stamp Science IGCSE Biology revision
Very useful revision for IGCSE Biology (this is Cambridge syllabus, co-ordinated science = dual award). There are lessons, notes, revision sheets and videos here organised into topic areas.
Lots of biology videos, this is US site so are aimed at AP Biology rather than A level, but many are useful.
A level biology videos explained by biology students. Concise and useful information, many topics (this says OCR but most will cover AQA as well).
Youtube Channel, 140 biology videos here, explained by a teacher. Not particularly aimed at A level spec, but many of a similar level, all sorts of topics for year 12 and year 13.
A level science revision
Youtube videos for AS old unit 2 topics – cell biology, genetics etc. (old spec)
Mr Pollock Biology
Revision videos on Youtube from a Biology teacher, includes biological molecules and movement across membranes (old spec).
Create a DNA fingerprint
Interactive exercise – create a DNA fingerprint to solve the crime – which sister licked the lollipop?
DNA fingerprinting animation
Animation explaining how DNA fingerprinting works.