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प्रश्न
There is only one possible sequence of amino acids when deduced from a given nucleotides. But multiple nucleotides sequence can be deduced from a single amino acid sequence. Explain this phenomena.
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उत्तर
Some amino acids are coded by more than one codon (known as degeneracy of codons), hence on deducing a nucleotide sequence from an amino acid sequence, multiple nucleotide sequence will be obtained. For e.g., Ile has three codous: AUU, AUC AUA hence a depeptide Met–Ile can have the following nucleotide sequence:
- AUG – AUU
- AUG – AUC
- AUG – AUA
and if, we deduce amino acid sequence for the above nucleotide sequences, all the three will code for Met–Ile
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संबंधित प्रश्न
Answer the following question.
State the importance of a Genetic code in protein biosynthesis.
Differentiate between the genetic codes given below:
Unambiguous and Universal
Name the anticodon required to recognize the following codon: CGA
Name the anticodon required to recognize the following codon: UAU
DNA is a polymer of nucleotides which are linked to each other by 3’-5’ phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose?
Frame shift mutation occurs when ______.
Khorana first deciphered the triplet codons of ______.
Out of A=T, G =C pairing, bases of DNA may exist in alternate valency state owing to arrangement called ______.
Which out of the following statements is incorrect?
If the sequence of bases in coding strand of DNA is ATTCGATG, then the sequence of bases in mRNA will be ______.
Which of the following organ is essential for photorespiration?
What would happen if in a gene encoding a polypeptide of so amino acid 25th (UAC) is match to UAA?
Genetic code is universal, it means ______
Statement I:
The codon ‘AUG’ codes for methionine and phenylalanine.
Statement II:
‘AAA’ and ‘AAG’ are both codons that code for the amino acid lysine.
In light of the above statements, choose the correct answer from the options given below.
Given below is a sequence of bases in mRNA of a bacterial cell. Identify the amino acid that would be incorporated at codon position 3 and codon position 5 during the process of its translation.
3' AUCAGGUUUGUGAUGGUACGA 5'
Which one of the following is a termination codon?
Who proposed that the genetic code for amino acids should be made up of three nucleotides?
