Is it my responsibility to take care of my siblings?

Long story short. I have no problem watching my siblings while my parents are gone. I’m 20 but my mom wants me to cook, clean, make sure they doing what they suppose to do, help them with homework and everything else. I’m in college but I stayed at home for this semester and I just feel like it’s unfair because I’m the older sibling and she says that I’m not responsible because I refuse to do all the things she asking because she had to do it at her age. I don’t mind watching them or helping them but I feel like she don’t understand that I’m in college and I’m still trying to figure myself out too while
Is it my responsibility to take care of my siblings?
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