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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
Write the contributions of the following scientists in deciphering the genetic code.
George Gamow; Hargobind Khorana; Marshall Nirenberg; Severo Ochoa
Answer the following question.
State the importance of a Genetic code in protein biosynthesis.
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: CGA
Name the anticodon required to recognize the following codon: UAU
Name the anticodon required to recognize the following codon: GCA.
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 ______.
Because most of the amino acids are represented by more than one codon, the genetic code is ______.
The number of base substitution possible in amino acid codons is ______.
Out of A=T, G =C pairing, bases of DNA may exist in alternate valency state owing to arrangement called ______.
H. J. Muller was awarded Nobel Prize for his ______.
Which out of the following statements is incorrect?
Some amino acids are coded by more than one codon, hence the genetic code is ______.
Select the incorrectly matched pair.
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?
Phenylalanine is a ______.
Percentage of mitochondrial DNA in the cell is:
Which amino acid is determined by four genetic codes?
Which of the following statements is the most appropriate for sickle cell anaemia?
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.
Discuss the process of translation in detail.
