The loan from d to e represents evaporation
I can tell you that it is NOT B.
I got it wrong.
Since guanine - cytosine and adenine - thymine are are always paired in the DNA, the amount of cytosine is approximately the same as guanine and the amount of thymine is approximately the same as adenine
Cells prevent mutations during DNA replication by using their mechanisms which are mismatch repair, direct repair, base excision repair, and nucleotide excision repair.
