Both the courses are great. If you are doing Integrated Msc biology then you need not have to worry about entrances in order to get admission to MSc course after your BSc. Now while choosing the integrated MSc course you should be sure that the college you are taking admission is good and have proper infrastructure and curriculum which can help you in future. Now if you see that you are getting MSc in a average college/university then I would recommend you not to go for else its better for you to go for BSc from any college and then try for MSc in a very good college. As MSc is a research oriented course, you should select a college with proper infrastructure. Thus if you get a good college for Integrated MSc then only go for it else its better to go for BSc course.

To know more about Biology as a career visit the link below:

https://www.careers360.com/courses/biology-course

I hope this answer helps. All the very best for your future endeavors!