NEET 2017 Biology question
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
Answer: (3)
Solution
The 999 bases form 333 codons (3 bases each). Bases 901 to 903 make codon number 301 (since 900 bases = 300 codons). Deleting base 901 causes a frameshift: the reading frame shifts from this codon onwards, so every codon
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