What are the four nucleotide bases present in trna? do these bases differ from those found mrna ?

No, both the mRNA and tRNA have the same sequence of genetic material inside its structure, as the number and sequence of the nucleotide bases are same in both the molecules. But, there is a difference in there functionality,as the mRNA helps in the transcription process, while the tRNA is present in the ribosomes operating for the purpose of translation process.There are mainly four nucleotide bases present inside both the mRNA  and tRNA molecule are as follows;Adenine,Guanine,Cytosine,Uracil.RNA(Ribo-nucleic acid)-

The RNA contains a single stranded sequence of genetic elements which are unique to each cell or individual body.The RNA is basically composed through slicing of the DNA molecule into half. But, along with that the main difference between the RNA and DNA comes by the replacement of the nucleotide thymine in the DNA  by the inclusion of the Uracil as the nucleotide. And along with that there is a difference between the sugar ribose inside the two molecules.