Once again, biology (molecular and cell biology and integrative biology) at UCB are not impacted majors.
Students in the UCB College of Letters and Science (the largest division) just need to earn C grades in the prerequisites to declare those majors.
https://mcb.berkeley.edu/undergrad/major/major/declaring
https://ib.berkeley.edu/undergrad/major/declaring.php
Of course, it is not easy to get admitted to UCB in the first place.