In the class 12 Biology syllabus, lab experiments carry a total of 30 marks. The breakdown is as follows:
One Major Experiment: 5 marks
One Minor Experiment (Experiments 2 & 3): 4 marks
Slide Preparation (Experiment 1 & 4): 5 marks
Spotting: 7 marks
Practical Record + Viva Voce: 4 marks
Investigatory Project + Project Record + Viva Voce: 5 marks