Question detail
Which option avoids the common misconception in this objective for Reproduction, DNA structure (biology only): students must describe each nucleotide as containing a sugar, phosphate group and one of four bases.
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. Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches DNA structure (biology only) because students must describe each nucleotide as containing a sugar, phosphate group and one of four bases.
- B. Common misconception: Explaining protein coding without naming the gene as the relevant section of DNA. This would blur DNA vs genes instead of testing DNA structure (biology only).
- C. Partial misconception: Treating DNA as if it always means one gene. This misses the objective focus on describe each nucleotide as containing a sugar, phosphate group and one of four bases.
- D. Terminology mix-up: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA structure (biology only).
Answer
The correct option is Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches DNA structure (biology only) because students must describe each nucleotide as containing a sugar, phosphate group and one of four bases.. 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 Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches DNA structure (biology only) because students must describe each nucleotide as containing a sugar, phosphate group and one of four bases.. Misconception avoided: A DNA base sequence is the storage format; a gene is the named instruction unit. This matches DNA structure (biology only) because students must describe each nucleotide as containing a sugar, phosphate group and one of four bases. is correct because A DNA base sequence is the storage format; a gene is the named instruction unit. The learning objective says students must describe each nucleotide as containing a sugar, phosphate group and one of four bases, so the answer must stay inside DNA structure (biology only). The alternative options are wrong because they either explaining protein coding without naming the gene as the relevant section of dna., treating dna as if it always means one gene., or drift away from do not use dna, gene, and chromosome as interchangeable answers..
Common mistake
Forgetting the phosphate group
Students often describe a nucleotide as only a sugar and a base, omitting the phosphate group that links nucleotides together.
Remind students that a nucleotide consists of a five‑carbon sugar, a phosphate group attached to the 5’ carbon, and one of the four nitrogenous bases (A, C, G or T).
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