Multiple Choice
In the standard genetic code, what amino acid is specified by the mRNA codon CCU?
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1. Introduction to Biochemistry
Central Dogma
Multiple Choice
In the context of the central dogma, what is the primary role of tRNA during protein synthesis?
A
It carries a specific amino acid and matches its anticodon to the complementary codon on mRNA at the ribosome.
B
It catalyzes peptide bond formation as the main enzymatic component of the ribosome.
C
It modifies newly synthesized proteins by adding carbohydrate groups in the cytosol.
D
It serves as the template that is transcribed into mRNA by RNA polymerase.
Verified step by step guidance1
Understand the central dogma of molecular biology, which describes the flow of genetic information from DNA to RNA to protein.
Recall that during protein synthesis, messenger RNA (mRNA) carries the genetic code from DNA to the ribosome, where proteins are assembled.
Recognize that transfer RNA (tRNA) functions as an adaptor molecule that brings specific amino acids to the ribosome based on the codon sequence of the mRNA.
Know that each tRNA has an anticodon region that is complementary to a specific mRNA codon, ensuring the correct amino acid is added to the growing polypeptide chain.
Distinguish the role of tRNA from other molecules: it does not catalyze peptide bond formation (that is the ribosome's role), does not modify proteins post-translationally, and is not a template for mRNA synthesis.
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