Can anyone help me for revision on triple science B1 test?
I guess since 21st century’s triple science course has a unit called B1, that’s the one you mean. There is a section on the BBC Bitesize site (http://www.bbc.co.uk/schools/gcsebitesize/science/21c/genes/) that I used, and I got 45/50 on the exam (that’s an A*) so I guess it works. But also, if you go through the book and answer the questions you get a good understanding of everything.