Question detail
Which option best identifies the exact concept boundary for Reproduction, DNA structure (biology only): students must recall that DNA contains the four bases A, C, G and T.
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. Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must recall that DNA contains the four bases A, C, G and T.
- B. Scale confusion: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing DNA structure (biology only).
- C. Process confusion: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on recall that DNA contains the four bases A, C, G and T.
- D. Evidence confusion: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA structure (biology only).
Answer
The correct option is Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must recall that DNA contains the four bases A, C, G and T.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in DNA structure (biology only).
Explanation
The correct option is Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must recall that DNA contains the four bases A, C, G and T.. Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must recall that DNA contains the four bases A, C, G and T. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must recall that DNA contains the four bases A, C, G and T, so the answer must stay inside DNA structure (biology only). The alternative options are wrong because they either calling a gene a whole chromosome., explaining protein coding without naming the gene as the relevant section of dna., or drift away from when asking about genes, test a section of dna, protein coding, alleles, or inherited characteristics..
Common mistake
Misidentifying DNA Bases
Students often confuse the four bases of DNA, mixing up their letters or omitting one or more of them.
To fix this, students should create a mnemonic or visual aid to remember the bases A (adenine), C (cytosine), G (guanine), and T (thymine) and practice recalling them regularly.
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