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Which molecule bears codons and which molecule anticodons?

Last updated date: 13th Jun 2024
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Hint:We usually see “codons” referred to on mRNA and “anticodons” on tRNA. However, the tRNA is really the object that “contains” the codon from a theoretical point of view.

Complete Answer:
1) The messenger RNA (mRNA) molecule that is formed as a result of transcription is said to harbour the codon specific for particular amino acid sequences.
2) Each tRNA molecule is chemically linked to a single, specific amino acid. They also have in their sequence a unique combination of three nucleotides that are aligned to the mRNA that is being translated. This pairing between the chemical linked amino acid and the three nucleotides used for mRNA alignment are what makes the “triplet codon” exist.
3) Whereas, an anticodon is found at one end of a transfer RNA (tRNA) molecule. During protein synthesis, every time an amino acid is added to the growing protein and later a tRNA forms base pairs with its complementary sequence on the mRNA molecule, ensuring that the proper amino acid is inserted into the protein.

Additional information:The anticodon – a sequence of three nucleotides on a tRNA molecule that bond to a complementary sequence on an mRNA molecule. The anticodon sequence determines the amino acid that the tRNA carries. codon– a sequence of three nucleotides on a mRNA molecule that encode a specific amino acid. Anticodons are found on molecules of tRNA.

Note:Each three-letter sequence of mRNA nucleotides (codons) corresponds to a specific amino acid, or to a stop codon. UGA, UAA, and UAG are stop codons.