WORTH 30 POINTS!!!
A part of an mRNA molecule with the following sequence is being read by a ribosome: 5'-UGC-GCA-3' (mRNA). The charged transfer RNA molecules shown in the figure below (with their anticodons shown in the 3' to 5' direction) are available. Two of them can correctly match the mRNA so that a dipeptide can form:
tRNA Anticodon
Amino| Acid
GGC | Proline
CGU |Alanine
UGC |Threonine
CCG |Glycine
ACG |Cysteine
CGG |Alanine
Which of the following dipeptides will be formed?
A. Proline-Threonine
B. Glycine-Cysteine
C. Alanine-Alanine
D. Cysteine-Alanine