New answers tagged homework
I think that the main reason (but probably not the only one) is because fats are hydrophobic, while the environment of the digestive tract is aqueous. Most of the fats in the diet are triglyceride and in hydrophilic environment they form globules. Triglycerides must be hydrolysed to be absorbed by the duodenum and this work is done by pancreatic lipase, that ...
Sounds seriously like your homework, so it'd be better if you researched. However as a starting point amino acids can be polar and non-polar. These properties cause varying forces of attraction between amino acids and their surrounding environment. The location changes the way they can interact. Ask if you are unsure about something :)
Top 50 recent answers are included