BIOLOGY
STRUCTURE OF PROTEINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following best describes a stop codon?
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A stop codon signals that the protein is finished being built
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A stop codon signals that the ribosome needs to pause before continuing to build the protein
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A stop codon signals that the amino acid chain should break in half midway through construction
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A stop codon signals that the tRNA’s should only retrieve 3 more amino acids to finish building the protein
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Explanation:
Detailed explanation-1: -1) Stop Codon: Stop codons is a mRNA which is a sequence of three nucleotides. It signals to stop the protein synthesis in the cell.
Detailed explanation-2: -There are 3 STOP codons in the genetic code-UAG, UAA, and UGA. These codons signal the end of the polypeptide chain during translation.
Detailed explanation-3: -A stop codon is a sequence of three nucleotides (a trinucleotide) in DNA or messenger RNA (mRNA) that signals a halt to protein synthesis in the cell.
Detailed explanation-4: -Thus the correct answer is (B). UGA, UAG, UAA are called stop codons.
Detailed explanation-5: -UGA, UAA, and UAG are stop codons.
There is 1 question to complete.