Multiple Choice
In the context of tRNA, rRNA, and the genetic code, what is the sedimentation coefficient (size) of a typical eukaryotic cytosolic ribosome?
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5. DNA to RNA to Protein
tRNA, rRNA and the Codon Code
Multiple Choice
In translation, which molecule transports specific amino acids to the ribosome by matching its anticodon to the mRNA codon?
A
Transfer RNA (tRNA)
B
DNA polymerase
C
Messenger RNA (mRNA)
D
Ribosomal RNA (rRNA)
Verified step by step guidance1
Understand the process of translation, which is the synthesis of proteins from mRNA templates in the ribosome.
Identify the role of each molecule listed: DNA polymerase synthesizes DNA, mRNA carries the genetic code from DNA, rRNA forms the core of the ribosome's structure and catalyzes peptide bond formation.
Recognize that the molecule responsible for transporting specific amino acids to the ribosome is the one that can recognize codons on the mRNA through complementary base pairing.
Recall that transfer RNA (tRNA) has an anticodon region that pairs with the mRNA codon and an attached specific amino acid corresponding to that codon.
Conclude that tRNA is the molecule that matches its anticodon to the mRNA codon and delivers the correct amino acid during translation.
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