Which amino acids will be picked up for the codon AGU

What is the one part of the nucleotide  that differs among the other different nucle  tides?

You are given an electron micrograph of a bacterial cell. in the micrograph you can clearly see three thin layers of different densities surrounding the cell. based on the micrograph, you can infer that this cell is and would appear after application of the gram stain procedure. gram-negative / pink gram-positive / purple gram-positive / pink gram-negative / purple

The type of fossil where the name literally means "turning to stone".