The program of ZNO Biology gives students the opportunity to take a course on the preparation of theoretical material and trial testing, which gives an opportunity to check the level of their knowledge. The method of performing all test tasks in the proposed tests is as close as possible to real tests. The program implements the possibility of passing the test and checking for errors when an incorrect answer is indicated (an incorrect answer is highlighted in red), as well as the result of the total number of correct answers (the correct answer is highlighted in green).