True or False: Eukaryotic mRNAs are processed and then translated as is.

In eukaryotic cells, mRNA undergoes several processing steps before it can be translated into protein. This processing includes the addition of a 5' cap, the polyadenylation of the 3' end, and splicing to remove introns and join exons together. These modifications are essential for the stability of the mRNA, regulation of translation, and proper export of the mRNA from the nucleus to the cytoplasm.

After these processing steps, the mature mRNA is finally translated into protein. Therefore, eukaryotic mRNAs are not translated "as is"; they require these crucial modifications first. Thus, the statement is indeed false, confirming that choice B is correct. This understanding is fundamental in genetics and molecular biology, highlighting the complexities of gene expression in eukaryotic organisms.