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Sickle cell anemia results from a single...

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

A

point mutations

B

frame shift mutation

C

silent mutations

D

both a and b

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The correct Answer is:
a
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NCERT FINGERTIPS-MOLECULAR BASIS OF INHERITANCE-Molecular Basis Of Inheritance
  1. Read the following statements. (i) One codon codes for only one amin...

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  2. The mutations that involve addition, deletion or substitution of a sin...

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  3. Sickle cell anemia results from a single base substitution in a gene, ...

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  4. Select the incorrect matched pair.

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  5. Identify the labels A, B, C and D in the given structure of tRNA and s...

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  6. The differences between mRNA amd tRNA are that mRNA has more elabor...

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  7. Amino acid acceptor end of tRNA lies at

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  8. Which RNA carries the amino acids from the amino acid pool to mRNA dur...

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  9. During translation , activated amino acids get linked to tRNA. This pr...

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  10. Refer to the given mRNA segment It can be translated completely in...

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  11. In a mRNA molecule, untranslated regions (UTRs) are present at

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  12. UTRs are the untranslated regions present on

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  13. Given below are the steps of protein synthesis. Arrange them in correc...

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  14. Refer to the given figure Select the option which identifies pola...

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  15. Which of the following statement is correct regarding ribosomes ?

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  16. What would happen if in a gene encoding a polypeptide of 50 amino acid...

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  17. Match column I with column II and select the correct option from the ...

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  18. Regulation of gene expression occus at the level of

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  19. During expression of an operon , RNA polymerase binds to

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  20. The sequence of structural genes in lac operon is

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