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.
$$\begin{array} { | c | c | }
\hline \text { tRNA Anticodon } & \text { Amino Acid } \
\hline \text { GGC } & \text { Proline } \
\text { CGU } & \text { Alanine } \
\text { UGC } & \text { Threonine } \
\text { CCG } & \text { Glycine } \
\text { ACG } & \text { Cysteine } \
\text { CGG } & \text { Alanine } \
\hline
\end{array}$$
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Which of the following anticodons in the first tRNA to bind will complement this mRNA?

Question

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.
$$\begin{array} { | c | c | } 
\hline \text { tRNA Anticodon } & \text { Amino Acid } \
\hline \text { GGC } & \text { Proline } \
\text { CGU } & \text { Alanine } \
\text { UGC } & \text { Threonine } \
\text { CCG } & \text { Glycine } \
\text { ACG } & \text { Cysteine } \
\text { CGG } & \text { Alanine } \
\hline
\end{array}$$
-
Which of the following anticodons in the first tRNA to bind will complement this mRNA?

Quizplus · Accepted Answer

The mRNA sequence 5'-CCG-ACG-3' will pair with tRNA anticodons 3'-GGC-5' (for CCG) and 3'-UGC-5' (for ACG). The correct anticodon for the first codon CCG is 3'-GGC-5', which corresponds to proline.

A Part of an MRNA Molecule with the Following Sequence