Question detail
Which option gives the correct cause-and-effect relationship 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. 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 recall that DNA contains the four bases A, C, G and T.
- 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 recall that DNA contains the four bases A, C, G and T.
- 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 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 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 recall that DNA contains the four bases A, C, G and T.. 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 recall that DNA contains the four bases A, C, G and T. is correct because DNA is the molecule; a gene is a functional section of that molecule. 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 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
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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