What is the single most correct statement about tRNAs?
A. They enter the ribosome with or without an amino acid attached
B. They spontaneously bind the amino acid that is linked to their anti-codon
C. They can only enter the ribosome after having an amino acid attached.
D. They are small RNAs that bind amino acids.
E. An Ef-Tu protein checks them to see if they have an amino acid attached and then guides the tRNA into the Ribosome