Question detail
Which option best matches the approved learning objective for DNA structure (biology only) (1)?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reproduction
Question
- A. It means students should be able to model insertions and deletions in chromosomes to illustrate mutations.
- B. It means A is never assessed in Reproduction.
- C. It means learners only need to memorise the topic title for DNA structure (biology only).
- D. It means students should give the opposite of the approved learning objective.
Answer
The correct answer is It means students should be able to model insertions and deletions in chromosomes to illustrate mutations..
Explanation
The correct option is It means students should be able to model insertions and deletions in chromosomes to illustrate mutations. because it directly reflects the approved learning objective: Model insertions and deletions in chromosomes to illustrate mutations..
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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