If a trna molecule has an anticodon which reads cag, what was the codon on the mrna molecule? 1) aug 2) gtc 3) uag 4) guc

The code on the mRNA molecule would have been GUC.

The answer is 4)GUC
Remember that the base pairs for RNA are:
 Adenine-Uracel and Cytosine-Guanine

The base sequence for tRNA will be the complement of the mRNA sequence:
tRNA                  mRNA
C                           G
A                           U
G                           C

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.