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प्रश्न
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.
A single base mutation in a gene may not ‘always’ result in loss or gain of function. Do you think the statement is correct?
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उत्तर
The statement is correct. Because of degeneracy of codons, mutations at third base of codon, usually does not result into any change in phenotype. This is called silent mutations.
Notes
Students should refer to the answer according to their questions.
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संबंधित प्रश्न
Differentiate between the genetic codes given below:
Unambiguous and Universal
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: AAU.
Name the anticodon required to recognize the following codon: UAU
One of the following is true with respect to AUG.
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?
Genetic code is ______.
Frame shift mutation occurs when ______.
Khorana first deciphered the triplet codons of ______.
Because most of the amino acids are represented by more than one codon, the genetic code is ______.
The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as ______.
If the sequence of bases in coding strand of DNA is ATTCGATG, then the sequence of bases in mRNA will be ______.
Phenylalanine is a ______.
Percentage of mitochondrial DNA in the cell is:
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?
George Gamow suggested that each codon coding for an amino acid consists of ______
Which amino acid is determined by four genetic codes?
Frame shift mutations are caused by ______.
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.
Which of the following statements is the most appropriate for sickle cell anaemia?
Based on your understanding of genetic code, explain the formation of any abnormal hemoglobin molecule. What are the known consequences of such a change?
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.
Who proposed that the genetic code for amino acids should be made up of three nucleotides?
