Question

which of the following correctly organizes these genetic terms in order from smallest to largest?
chromosome, gene, nucleotide, dna molecule
nucleotide, gene, dna molecule, chromosome
dna molecule, nucleotide, gene, chromosome
dna molecule, nucleotide, chromosome, gene

Explanation:

A nucleotide is the basic building block of DNA. A gene is a segment of DNA. A DNA molecule consists of many genes. A chromosome contains a DNA molecule (along with proteins). So the order from smallest to largest is nucleotide (smallest unit), then gene (a part of DNA), then DNA molecule (carrying genes), and chromosome (containing DNA molecule) is the largest among these.

Answer:

nucleotide, gene, DNA molecule, chromosome (the second option)