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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

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.

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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?

अति संक्षिप्त उत्तर
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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.

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Notes

Students should refer to the answer according to their questions.

  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 6: Molecular Basis of Inheritance - SHORT ANSWER [पृष्ठ ४२]

APPEARS IN

एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
अध्याय 6 Molecular Basis of Inheritance
SHORT ANSWER | Q 13. | पृष्ठ ४२
नूतन Biology [English] Class 12 ISC
अध्याय 4 Principles of Inheritance and Variation
HIGHER ORDER THINKING SKILLS QUESTIONS | Q 27. | पृष्ठ २११

संबंधित प्रश्न

Give an example of a codon having a dual function.


Write the contributions of the following scientists in deciphering the genetic code.
George Gamow; Hargobind Khorana; Marshall Nirenberg; Severo Ochoa


Differentiate between the genetic codes given below:
Unambiguous and Universal


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: 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?


Genetic code is ______.


The number of base substitution possible in amino acid codons is ______.


Which out of the following statements is incorrect?


The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as ______.


Sickle cell anemia results from a single base substitution in a gene, thus it is an example of ______.


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 ______.


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 ______


Which amino acid is determined by four genetic codes?


How many codons code for amino acid?


Frame shift mutations are caused by ______.


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.


Discuss the process of translation in detail.


Which one of the following is a termination codon?


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