THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Detailed explanation-1: -Ochre (UAA), opal (UGA) and amber (UAG) are stop codons that causes termination of protein synthesis. Assertion is correct.
Detailed explanation-2: -The three stop codons UAA, UAG, and UGA signal the termination of mRNA translation.
Detailed explanation-3: -In summary, the UGA codon in an mRNA usually indicates translation termination. However, in some cases, wherein this codon occurs in an ORF and in the presence of the Sec insertion machinery and the SECIS element in its proper position, UGA is used for incorporation of Sec.
Detailed explanation-4: -There are 3 STOP codons in the genetic code-UAG, UAA, and UGA. These codons signal the end of the polypeptide chain during translation. These codons are also known as nonsense codons or termination codons as they do not code for an amino acid.
Detailed explanation-5: -The presence of a stop codon-UAA, UAG or UGA-in the A site of the ribosome is generally a signal to terminate protein synthesis. This process constitutes the last essential stage of translation, as it ensures the formation of full-sized proteins.