Cells That Use the Amino Acids Selenocysteine and Pyrrolysine Have

Question

Cells that use the amino acids selenocysteine and pyrrolysine have
A)two more codons compared to other cells.
B)two more tRNAs compared to other cells.
C)two more aminoacyl-tRNA synthetases compared to other cells.
D)two more tRNAs and aminoacyl-tRNA syntheses compared to other cells.
E)inosine at the third position of their tRNA anticodons to accommodate these amino acids.

Accepted Answer

Cells that incorporate selenocysteine and pyrrolysine into their proteins require two additional tRNAs and two additional aminoacyl-tRNA synthetases to recognize and attach these unique amino acids to their respective tRNAs.