Hello Student

You have not mentioned the particular name of the examination in which you want to appear and in which study you are going to take and are continuing so far. If it is class 12 exam and biology is your subject in the two different theme of study that related to biology is not possible to complete in one day.The total preparation of the subjects will take at least  3 to 6 months rigarus study, that include practice and revise of previous years question paper and taking mock tests of the related subjects.

Hope this will help.