Which amino acid chain will be formed by the codons shown below?
ggu agc cgg

C. Gly-Ser-Arg

Explanation:

Gene expression is an important process in living cells as it involves the synthesis of useful products (proteins) needed for optimal functioning of the cell. Gene expression occurs in two major stages viz: transcription and translation. Transcription involves the synthesis of a mRNA molecule using a DNA template.

Translation, on the other hand, occurs in the ribosome (organnelle for protein synthesis). The mRNA molecule produced during transcription is read in a group of three nucleotides called CODON. Each codon specifies a particular amino acid i.e. as one codon is read, one amino acid is added to the polypeptide chain (future protein).

Based on this, a mRNA molecule with a sequence: GGU AGC CGG is composed of three codons, which codes for three amino acids. Using the genetic code provided as an attachment to this question,

Codon GGU codes for Glycine (Gly) amino acid

Codon AGC codes for Serine (Ser) amino acid

Codon CGG codes for Arginine (Arg) amino acid.

Hence, GGU AGC CGG mRNA sequence will synthesize an amino acid sequence: Gly-Ser-Arg.

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