Question detail

Which option best identifies the exact concept boundary for Reproduction, DNA structure (biology only): students must explain that the order of bases controls the order of amino acids in a protein.

Try the question, check the answer, then read the explanation to understand the curriculum point.

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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 explain that the order of bases controls the order of amino acids in a protein.
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 explain that the order of bases controls the order of amino acids in a protein.
D. Evidence confusion: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA structure (biology only).

Answer

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 explain that the order of bases controls the order of amino acids in a protein.. Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must explain that the order of bases controls the order of amino acids in a protein. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must explain that the order of bases controls the order of amino acids in a protein, 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

Base‑order misinterpretation

Students think the order of bases only affects the DNA sequence, not the resulting protein sequence.

Explain that each codon (three bases) is read by the ribosome to specify a particular amino acid, so changing base order changes the amino‑acid order in the protein.

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