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miv72 [106K]
3 years ago
5

Which type of mutation always creates a stop codon?

Biology
2 answers:
Hatshy [7]3 years ago
7 0
The type of mutation that does this is a point substitution mutation, more specifically A Nonsense mutation. It changes a codon coding for an amino acid to a codon coding for the signal to stop or terminate translation.
Vitek1552 [10]3 years ago
4 0

Answer:

The correct answer would be nonsence mutation.

It is a type of point mutation in which an amino acid coding codon is converted into a stop codon.  

It results in the termination of a premature polypeptide chain.

For example, the mutation of codon third GCT into ACT in which guanine is replaced with adenine.

DNA template strand  3' - TAC TGA GCT GTG GCT CGC TCG ACT - 5'

mRNA sequence         5' - AUG ACU CGA CAC CGA GCG AGC UGA- 3'

Amino acid sequence       Met   Thr    Arg  His    Arg  Ala   Ser    Stop

Mutated DNA template strand  3'-TAC TGA ACT GTG GCT CGC TCG ACT -5'

mRNA sequence                       5'- AUG ACU UGA CAC CGA GCG AGC UGA-3'

Amino acid sequence                   Met   Thr    Stop  

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