How many chromosomes do humans have in each body cell - and which scientist first came up with the idea of biological inheritance?
We have selected GCSE-level questions about every area of biology for our quiz, from plant biology to famous breakthroughs in genetics.
This quiz is inspired by real practice questions and previous exams, so it should let you see if you could really make the grade.
If you know your zygotes from your gametes and your stamen from your anthers, read on!
Whether you wonder if you could still pass your GCSE, or you just fancy yourself as an armchair scientist, this quiz should keep you guessing.
Every question is multiple choice (so it should be a little easier than the real thing) - are you top of the class?
* Can’t get enough trivia action? Check out our dedicated Yahoo Quizzes page for more brainteasers! *