Use the following information to answer the 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 dipeptides will form from this mRNA?
A) cysteine-alanine
B) proline-threonine
C) glycine-cysteine
D) alanine-alanine

Question

Use the following information to answer the 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 dipeptides will form from this mRNA?
A) cysteine-alanine
B) proline-threonine
C) glycine-cysteine
D) alanine-alanine

Quizplus · Accepted Answer

The anticodon for CGU is 3′-CGU-5′, which can correctly match the mRNA codon 5′-CCG-3′. The anticodon for UGC is 3′-UGC-5′, which can correctly match the mRNA codon 5′-ACG-3′. Therefore, the two charged tRNA molecules that can correctly match the mRNA codons will bring in the amino acids alanine and threonine, forming a dipeptide of proline-threonine.

Use the Following Information to Answer the Question Which of the Following Dipeptides Will Form from This MRNA