If you want to do a masters in biochem but you are in a life sci spec and only have taken 2 biochem courses, then you might have difficulty getting into a biochem grad program (This is true). But if you are in life sci but you have taken a variety of biochem related courses, then grad school "should" not be a problem. But check out the grad programs you want to apply for, some of them DO REQUIRE you to have background in the field of studying you are applying for (This is true as well!)
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