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STD 12 - 5. molecular basis of inheritance — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 5. molecular basis of inheritance1 Mark
MCQ
Mutations which alter nucleotide sequence within a gene are called
  • A
    frame shift mutations
  • B
    base pair substitutions
  • ✓
    both $(a)$ and $(b)$
  • D
    none of these
✓

Answer

Correct option: C.
both $(a)$ and $(b)$
c
In frame shift mutation the reading of the frame of the base sequence shifts laterally either in forward direction due to addition of one or more nucleotides or in backward direction due to deletion of one or more nucleotides. Whereas in base pair substitution a base pair is replaced by another base which results in change of nucleotide sequence.

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