There are different types of gene mutation - AQA - A-Level Biology - Question 2 - 2018 - Paper 1
Question 2
There are different types of gene mutation.
Put a tick (✓) in the box next to the statement which describes incorrectly the effect of the mutation in an exon of a g... show full transcript
Worked Solution & Example Answer:There are different types of gene mutation - AQA - A-Level Biology - Question 2 - 2018 - Paper 1
Step 1
A substitution may not result in a change to the encoded amino acid.
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Answer
This statement is correct as a substitution can lead to a synonymous mutation, where the amino acid remains the same.
Step 2
An inversion will result in a change in the number of DNA bases.
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Answer
This statement is incorrect, as an inversion does not change the total number of DNA bases. It only changes their order.
Step 3
A deletion will result in a frame shift.
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Answer
This statement is correct; a deletion of nucleotides shifts the reading frame of the gene.
Step 4
An addition will result in a frame shift.
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Answer
This statement is also correct, as an addition of nucleotides can disrupt the reading frame, leading to widespread changes in the resulting protein.
