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Identify the correct order of organisation of genetic material from largest to smallest:

1. Genome, chromosome, nucleotide, gene
2. Genome, chromosome, gene, nucleotide
3. Chromosome, genome, nucleotide, gene
4. Chromosome, gene, genome, nucleotide

Correct answer: Genome, chromosome, gene, nucleotide

Solution

A genome is the complete genetic content of an organism, so it is the largest level. Chromosomes are large DNA structures within the genome, genes are smaller DNA segments on chromosomes, and nucleotides are the smallest units.

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