Arrangement of $DNA$ has the triplet base sequence $AAC\ GAC\ AGC\ GGC\ ACA\ AAA$. Due to mutation, the first base only got deleted. Then the likely effect of this on the coding of the $DNA$ segment is that

  • [AIIMS 1980]
  • A

    The first amino acid will be different and all others will be like the earlier polypeptide

  • B

    The polypeptide will have one amino acid less

  • C

    There will be a complete change in the types and sequence of amino acid

  • D

    There will be no change in the polypeptide chain formed

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  • [AIPMT 1995]

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  • [NEET 2019]