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Mutations and Gene Editing · Paper 1 — Free Biology HL Practice Questions
1FoundationMCQTypes of mutations: Point, frameshift, chromosomal1 markPaper 1~2 min
A gene in a bacterium has the base sequence 5'-ATG GCA TTT GGG-3'. A frameshift mutation inserts an extra adenine after the sixth nucleotide, giving 5'-ATG GCA ATT TGG G-3'. Which consequence of this mutation is most likely?
Solutions
2FoundationMCQTypes of mutations: Point, frameshift, chromosomal1 markPaper 1~2 min
A coding strand of DNA has the sequence 5'-TAC GCA TTG-3'. A single nucleotide deletion removes the second base (A), producing a mutated template. Which of the following best describes the mRNA transcribed from this mutated DNA?
Solutions
3MasteryMCQTypes of mutations: Point, frameshift, chromosomal1 markPaper 1~2 min
A mutagen changes a single nucleotide in the coding strand of an E. coli gene, altering the sequence from 5'-GAA-3' to 5'-AAA-3'. GAA codes for glutamic acid and AAA codes for lysine. Which type of point mutation has occurred?
Solutions
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