THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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This forms hydrogen bonds with mRNA in the ribosome
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This codes for methionine
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UAG, UAA, and UGA are the only 3 types of these, 3 of these exist in the genetic code, A nonsense mutation creates a premature one of these, This ends translation, This does not code for an amino acid
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Detailed explanation-1: -Stop codons are nucleotide triplets in messenger RNA (mRNA) that serve a key role in signaling the end of protein coding sequences (e.g., UAG, UAA, UGA). Premature stop codons are those that occur within the normal coding sequence due to a mutation.
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. These codons are also known as nonsense codons or termination codons as they do not code for an amino acid.
Detailed explanation-3: -Stop Codon There are 64 different trinucleotide codons: 61 specify amino acids and 3 are stop codons (i.e., UAA, UAG and UGA).
Detailed explanation-4: -UAA, UAG and UGA are the stop codons, and do not code for amino acids. They are also known as termination codons or nonsense codons, and act as signals on the mRNA to stop protein synthesis.
Detailed explanation-5: -The results show that UAA, like UAG, directs the incorporation of glutamine, whereas UGA directs the incorporation of three amino acids, arginine, cysteine, and tryptophan.