[单选题]
The diagram shows a m-ue-koi xb (0tolecule thbig8 uu2mr8 r*at plays an important role in protein synthesis.
rg8 28*urub mi Which is found at X?
I. Uncoiled DNA
II. Amino acid binding site
III. RNA nucleotides
A. II only
B. I and II only
C. II and III only
D. I, II and III