Thanks a lot for your point, biotechie. Thesis-based masters programs slipped my mind entirely when I commented above.
I will definitely consider doing masters program if the program offers a great research opportunities and coursework. So Biotechie and GVh, other than masters in biology (which I think is pretty rare in US), what other masters programs might be a good option? I actually have some interest in masters in bioengineering. Any thoughts on this program?
Also do schools allow people to apply to both MS and PhD when the degrees are offered by different department (or division)? I will definitely contact schools to ask about this, but I would love to hear your answers now.