What two things aspects of proteins are determined by the amino acids and their sequence?

The two things aspects of proteins that are determined by the amino acids and their sequence are the chemical properties and the 3-Dimensional structure of the proteins. Proteins are essential for the structure, function, and regulation of the body's tissues and organs. Proteins are made up of hundreds of smaller units called amino acids that are attached to one another by peptide bonds, forming a long chain. 

If the experiment was perfomed more then once and you get the same results