A Part of an MRNA Molecule with the Following Sequence

question 6

Multiple Choice

A part of an mRNA molecule with the following sequence is being read by a ribosome: 5' CCG-ACG 3' (mRNA) . The following charged transfer RNA molecules (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.
$\begin{array} { c l } \text { tRNA Anticodon } & \text { Amino Acid } \\\hline \text { GGC } & \text { Proline } \\\text { CGU } & \text { Alanine } \\\text { UGC } & \text { Threonine } \\\text { CCG } & \text { Glycine } \\\text { ACG } & \text { Cysteine } \\\text { CGG } & \text { Alanine }\end{array}$
Figure 17.3
The dipeptide that will form will be

• A)cysteine-alanine.
• B)proline-threonine.
• C)glycine-cysteine.
• D)alanine-alanine.
• E)threonine-glycine.

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