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How would you arrange chromosome, gene, genome, and nucleotide in order from smallest to largest?

From smallest to largest: nucleotide, gene, chromosome, genome.


Nucleotides are the smallest building blocks of DNA. There are four nucleotides (A, G, T, C) which arrange in pairs to form the long double strands typical of DNA molecules. 


A gene is a segment of DNA which codes for the amino acid sequence of a particular protein. A gene is therefore composed of many pairs of nucleotides.


A chromosome is a long strand of DNA which...

From smallest to largest: nucleotide, gene, chromosome, genome.


Nucleotides are the smallest building blocks of DNA. There are four nucleotides (A, G, T, C) which arrange in pairs to form the long double strands typical of DNA molecules. 


A gene is a segment of DNA which codes for the amino acid sequence of a particular protein. A gene is therefore composed of many pairs of nucleotides.


A chromosome is a long strand of DNA which is coiled up with various proteins. A chromosome contains many genes.


The genome is all the DNA of a particular organism. All of an organism's chromosomes compose the organism's genome.


To summarize, we can think of the genome as being composed of a collection of chromosomes, of chromosomes as being a collection of genes, and of genes as being composed of nucleotides.

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