According to Prof. Dr. Nariman your practical toxicology exam would be about unknown identification in addition to the following:
1. Volume of injection calculation according to the law
volume of injection=
dose (mg/kg) X weight (g) X100
------------------------------------
conc (g%) X 1000 X1000
2. Mechanism of action of the given unknown (detailed)
3. A question about the experiment to be handeled
Meaning that you should study your sections
especially those concerning the 6 unknowns
Good Luck