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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
Give an example of a codon having dual function.
Differentiate between the genetic codes given below:
Degenerate and Initiator
Name the anticodon required to recognize the following codon: AAU.
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?
Khorana first deciphered the triplet codons of ______.
The number of base substitution possible in amino acid codons is ______.
Amino acids which are specified by single codons are ______.
The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as ______.
Select the incorrectly matched pair.
Which of the following organ is essential for photorespiration?
Methionine carrying tRNA has anticodon:
Genetic code was discovered by:
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’ both codons code for the amino acid lysine.
In the light of the above statements, choose the correct answer from the options given below.
Based on your understanding of genetic code, explain the formation of any abnormal hemoglobin molecule. What are the known consequences of such a change?
Discuss the process of translation in detail.
