Nutrition Classes

I am a nutrition major. I understand the concept of nutrition courses, but when it comes to chemistry and biology, I lose my car. I know what to do. Please answer my question who know the terrain and know what biology and chemistry is very important. Yes I know someone who has a great offer, but changed because of all the necessary chemistry. If you can not do chemistry and biology, nutrition is not for you. If you specialize in food, you should already know what the program is not composed of one look at the degree requirements in your program? - If there are many scientific needs, then you should do or change their specialty.