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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.
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George Gamow; Hargobind Khorana; Marshall Nirenberg; Severo Ochoa
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Name the anticodon required to recognize the following codon: GCA.
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H. J. Muller was awarded Nobel Prize for his ______.
Sickle cell anemia results from a single base substitution in a gene, thus it is an example of ______.
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 |
Which of the following organ is essential for photorespiration?
Phenylalanine is a ______.
Methionine carrying tRNA has anticodon:
How many codons code for amino acid?
A single base mutation in a gene may not ‘always’ result in loss or gain of function. Do you think the statement is correct? Defend your answer.
Which scientist developed a method for synthesizing RNA molecules with repeated known nucleotide sequences to help decipher the genetic code?
How many codons code for amino acids and how many are stop codons?
