C, H, O, only
C, H, O and N
C, H, O, P
C, H, O, S
Carboxylic acid portion
The sequence of amino acids makes up the primary shape. The polypeptide chains fold into 3-dimensional shapes that make up various structures.
The amino acids primary shape is a 3-D structure.
Carbohydrates form polypeptide chains.
Proteins are flat structures.
Paper bag/oily test
Bones and Muscles
Transport molecules (including Hemoglobin)