Question detail
Which option correctly contrasts the named ideas for Reproduction, DNA structure (biology only): students must describe DNA as a polymer made from repeating nucleotide units.
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. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units.
- B. Reversed contrast: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing DNA structure (biology only).
- C. Over-broad contrast: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on describe DNA as a polymer made from repeating nucleotide units.
- D. Unrelated contrast: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA structure (biology only).
Answer
The correct option is Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units.. 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 Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units.. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must describe DNA as a polymer made from repeating nucleotide units, 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
Confusing DNA Structure
Students often describe DNA as a single strand instead of recognizing it as a double helix made of two strands.
Emphasize that DNA is a polymer composed of two strands that twist to form a double helix, and ensure they understand the significance of the nucleotide units.
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