AUG GGC UCA

Is this a strand of DNA or RNA, and how can you tell?

RNA because it has the nitrogen base, Uracil.

DNA because it has the nitrogen base, Adenine

DNA because it has the sugar, Ribose

RNA because it has inorganic phosphate groups

This is a strand of RNA. The presence of the nitrogen base Uracil indicates that it is RNA, as Uracil is only found in RNA and not in DNA.