A protein contains 900 amino acids. What is the minimum number of nucleotides in the coding region of the mRNA that would encode this protein?

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Study for the A2 Genetic Control of Proteins Test. Engage with flashcards and multiple choice questions, each question is accompanied by hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

A protein contains 900 amino acids. What is the minimum number of nucleotides in the coding region of the mRNA that would encode this protein?

Explanation:
Codons are triplets of nucleotides, and each codon specifies one amino acid. For a protein of 900 amino acids, you need 900 codons to encode all the amino acids, which means 900 × 3 = 2700 nucleotides in the coding region of the mRNA. The stop codon, which signals termination, isn’t coding for an amino acid, so the minimal coding region that actually specifies the protein’s sequence is 2700 nucleotides.

Codons are triplets of nucleotides, and each codon specifies one amino acid. For a protein of 900 amino acids, you need 900 codons to encode all the amino acids, which means 900 × 3 = 2700 nucleotides in the coding region of the mRNA. The stop codon, which signals termination, isn’t coding for an amino acid, so the minimal coding region that actually specifies the protein’s sequence is 2700 nucleotides.

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