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Campbell Biology Chapter 16-17

Question:

The "universal" genetic code is now known to have exceptions. Evidence for this could be found if which of the following is true?

A) If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only).

B) If one stop codon, such as UGA, is found to have a different effect on translation than another stop codon, such as UAA.

C) If prokaryotic organisms are able to translate a eukaryotic mRNA and produce the same polypeptide.

D) If several codons are found to translate to the same amino acid, such as serine.

E) If a single mRNA molecule is found to translate to more than one polypeptide when there are two or more AUG sites.

Answer:

A) If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only).

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Last update by mayur on 03/27/2014
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Campbell Biology Chapter 16 17
Campbell Biology Chapter 16-17
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Free Flashcard From Campbell Biology Chapter 16-17
Question: The "universal" genetic code is now known to have exceptions. Evidence for this could be found if which of the following is true? A) If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only). B) If one stop codon, such as UGA, is found to have a different effect on translation than another stop codon, such as UAA. C) If prokaryotic organisms are able to translate a eukaryotic mRNA and produce the same polypeptide. D) If several codons are found to translate to the same amino acid, such as serine. E) If a single mRNA molecule is found to translate to more than one polypeptide when there are two or more AUG sites.
Answer: A) If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only).