Multiple Choice
The first amino acid inserted into a new polypeptide chain in eukaryotic cells is usually __________.
3. Energy & Cell Processes
Steps of Translation
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The tRNA for which amino acid is the first to enter the ribosome?
A
Arginine.
B
Lysine.
C
Methionine.
D
Histidine.
Verified step by step guidance1
Understand the role of tRNA in protein synthesis: tRNA molecules are responsible for bringing amino acids to the ribosome during translation, matching their anticodon with the mRNA codon.
Identify the start codon in mRNA: The start codon is typically AUG, which signals the beginning of protein synthesis.
Determine which amino acid corresponds to the start codon: The codon AUG codes for the amino acid Methionine.
Recognize that the tRNA carrying Methionine is the first to enter the ribosome: This tRNA pairs with the start codon AUG on the mRNA strand.
Conclude that Methionine is the first amino acid incorporated into the growing polypeptide chain during translation.
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