Which of the following variations on translation would be most disadvantageous for a cell? A) translating polypeptides directly from DNA. B) using fewer kinds of tRNA. C) having only one stop codon. D) lengthening the half-life of mRNA. E) having a second codon (besides AUG) as a start codon.

Question

Morse

Biology

28 October, 22:04

Which of the following variations on translation would be most disadvantageous for a cell? A) translating polypeptides directly from DNA. B) using fewer kinds of tRNA. C) having only one stop codon. D) lengthening the half-life of mRNA. E) having a second codon (besides AUG) as a start codon.

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Answers (1)

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Rodney Aguirre · Answer 1

The correct answer is A) translating polypeptides directly from DNA.

Explanation:

Transcription process is important for the production of proteins because mRNA is synthesized during the transcription process which has the correct sequence of codon which is read by ribosomes to make proteins.

DNA does not contain the right codon sequence for the formation of proteins and does not have uracil nucleotide which is found in mRNA therefore if DNA is used for translation then the wrong amino acids will be added into the polypeptide chain which can generate non-functioning proteins or mutated protein.

Therefore translating polypeptide directly from DNA would be more disadvantageous to the cell.