Which of the following is NOT TRUE about amino acids? A. There are 30 of them.
B. They are held together by peptide bonds.
C. They are free floating in the cytosol.
D. They are the building blocks of proteins.

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it