Question detail
Which option correctly contrasts the named ideas for Reproduction, DNA and the genome: students must explain that each gene codes for a sequence of amino acids to make a specific protein.
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 and the genome because students must explain that each gene codes for a sequence of amino acids to make a specific protein.
- B. Reversed contrast: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing DNA and the genome.
- C. Over-broad contrast: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on explain that each gene codes for a sequence of amino acids to make a specific protein.
- D. Unrelated contrast: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / DNA and the genome.
Answer
The correct option is Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA and the genome because students must explain that each gene codes for a sequence of amino acids to make a specific protein.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in DNA and the genome.
Explanation
The correct option is Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA and the genome because students must explain that each gene codes for a sequence of amino acids to make a specific protein.. Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches DNA and the genome because students must explain that each gene codes for a sequence of amino acids to make a specific protein. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must explain that each gene codes for a sequence of amino acids to make a specific protein, so the answer must stay inside DNA and the genome. 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
Gene‑Protein Link Misconception
Students often think a gene is a single amino acid or that the gene’s DNA sequence directly becomes the protein sequence without any intermediate steps.
Explain that a gene is a DNA segment that is first transcribed into mRNA, which is then translated by ribosomes into a polypeptide chain; the codon sequence in the mRNA determines the order of amino acids in the final protein.
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