I just graduated in May with a CS degree and was able to get a software engineering job paying $70,000. I didn't have any internships or any significant projects outside my classes.

Also, I had no programming experience prior to my first CS class, and I wasn't the only one. Those who do have experience may have an advantage in the first few courses but I feel like it evens out after that.

That should answer your main question I hope, but I gotta say I think doing both a CS and a bio degree is very ambitious. Not saying you can't pull it off, but like others have said, both are difficult degrees. Even more difficult if you're trying to keep a near 4.0.

I think it would be a good idea to take one or two programming courses and see how you like them. If you find that you enjoy programming and can get through the beginner courses without too much problem then you might be able to pull it off. However, if you find yourself struggling in the first class I would not go for the dual major.

But whatever you end up doing, good luck!