The diagram shows part of the DNA sequence of a gene and a mutated sequence of the same gene.
normal DNA sequence ... CCG GAT TAT TAG GAG AAA TGG CAT TCT AGG ...
mutated DNA sequence ... CCG GAT GTA TTG CGA GAA ATG CAT TCT AGG ...
What are possible effects of the mutated sequence?
1) the presence of mRNA stop codons, UAG, UAA or UGA
2) a change in the sequence of amino acids
3) a non-functional protein
4) ribosomes cannot translate the mRNA
1 )
1, 2 and 3
2 )
1, 3 and 4
3 )
1 and 4 only
2 and 3 only
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