Hello dear

Ya sure you can appear for your biology test papers in this year .don't be panic.you will be allowed to give exams while permission being given to some students to improve their marks their you can apply form for writing biology exams paper .most probably they will allow

The reason behind not allowing will definitely bcz of your 11 standard knowledge as it must be attended but nevertheless don't loose your hope.try for it ,luckily you can get the chance for biology exams

Till best of luck dear