Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question What is the primary psychoactive component in marijuana? Answers THC TMJ MRT AAP Explanation The main psychoactive substance in marijuana is called tetrahydrocannabinol, or THC. Take a FREE Practice Test Now This questions appears in the following tests: Minnesota Practice Test