Answer:
The correct answer is the second statement.
Explanation:
The process of replication comprises generation of daughter DNA strands by utilizing the information found within the parent DNA, with the assistance of DNA polymerase enzyme. It occurs at the time of the cell differentiation as the molecules of daughter DNA are provided to the novel daughter cells.
At the time of DNA replication, the pairing of adenine takes place with thymine and the pairing of guanine takes place with cytosine. The process occurs within the nucleus. The process of transcription comprises the generation of mRNA molecules with the assistance of template DNA and RNA polymerase enzyme.
At the time of DNA transcription also, adenine pairs with uracil in place of thymine, while guanine pairs with cytosine and the process also occurs within the nucleus. Thus, the second statement is the correct one.