Question detail

Which option gives the correct cause-and-effect relationship 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.

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At a glance

MCQ

Type

practice

Style

Topic

Reproduction

Question

A. Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units.
B. Reversed cause: Treating DNA as if it always means one gene. This would blur DNA vs genes instead of testing DNA structure (biology only).
C. Missing link: Calling a gene a whole chromosome. This misses the objective focus on describe DNA as a polymer made from repeating nucleotide units.
D. Different process: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA structure (biology only).

Answer

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. 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 cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units.. Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches DNA structure (biology only) because students must describe DNA as a polymer made from repeating nucleotide units. is correct because DNA is the molecule; a gene is a functional section of that molecule. 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 treating dna as if it always means one gene., calling a gene a whole chromosome., or drift away from when asking about dna, test molecular structure, base sequence, nucleotides, or genetic information storage..

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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