Answer:
See the answer below
Step-by-step explanation:
Replication is a process involving the production of daughter copy by DNA. Transcription, on the other hand, is a process during which the coding strand of DNA is used as a template for the production of mRNA - messenger RNA.
During DNA replication, Adenine is paired with Thymine while Guanine is paired with Cytosine. During transcription, Adenine's pairing is replaced with Uracil while Guanine/Cytosine pairing remains the same.
hence, the main difference between the base-pairing during both processes is the replacement of Thymine with Uracil during transcription.