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Answer:
Top
Step-by-step explanation:
Transcription is the biochemical process responsible for making the RNA molecule.
The RNA molecule is formed using one of the DNA strands as a model. Thus, the enzyme responsible for the formation of RNA, uses the sequence of nitrogenous bases of the DNA strand and forms the RNA molecule based on the complementarity of these DNA bases.
In the figure below, the RNA molecule is the red colored strand, which, as you can see, is being formed based on the top strand of DNA.