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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 a dual function.
The first codon to be deciphered was ______ which codes for ______.
Give reasons:
Genetic code is ‘universal’.
Name the anticodon required to recognize the following codon: UAU
Name the anticodon required to recognize the following codon: GCA.
Out of A=T, G =C pairing, bases of DNA may exist in alternate valency state owing to arrangement called ______.
Amino acids which are specified by single codons are ______.
Some amino acids are coded by more than one codon, hence the genetic code is ______.
AUG on the mRNA will result in the activation of which of the following RNA having the correct combination of amino acids:
| Site A | Site B | |
| A. | UAC | Methionine |
| B. | Methionine | UAC |
| C. | Methionine | AUG |
| D. | AUG | Methionine |
Phenylalanine is a ______.
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 ______
How many codons code for amino acid?
Frame shift mutations are caused by ______.
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?
Which one of the following is a termination codon?
