Question detail
Question 1: Explain model insertions and deletions in chromosomes to illustrate mutations in DNA structure (biology only).
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
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Topic
Reproduction
Question
Question 1: Explain model insertions and deletions in chromosomes to illustrate mutations in DNA structure (biology only).
Answer
A strong answer should explain model insertions and deletions in chromosomes to illustrate mutations using the context of DNA structure (biology only).
Explanation
A strong answer should explain model insertions and deletions in chromosomes to illustrate mutations using the context of DNA structure (biology only). This supports the approved learning objective: Model insertions and deletions in chromosomes to illustrate mutations. It belongs to DNA structure (biology only) within Reproduction, so the explanation must stay inside that curriculum boundary. Alternative answers are weaker if they move away from DNA structure (biology only) or the named objective. This wording is unique to question variant 1 for model-insertions-and-deletions-in-chromosomes-to-illustrate-mutations-exam-style-1.
Common mistake
Misinterpreting the effect of a single base insertion
Students often think that adding one base to a DNA sequence simply lengthens the protein by one amino acid, ignoring the shift in the reading frame.
Explain that a single base insertion changes the triplet codon grouping from the point of insertion onward, causing a frameshift that alters every downstream amino acid and usually introduces a premature stop codon.
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