The sequence of bases on one strand of a DNA molecule is AGCCTAG. After transcription of this strand of DNA, what is the sequence of nitrogen bases on the complementary strand? A. UCGGAUC

B. TCGGATC

C. AGCCUAG

D. CTAGGCA

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

C) they are specialized meaning they are designed to do different things