Which chromosome is the longest in humans?

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Study for the PLTW Biomedical Science EOC Test. Engage with flashcards and multiple-choice questions, each with detailed explanations. Excel in your exam!

Multiple Choice

Which chromosome is the longest in humans?

Explanation:
Length of a chromosome is measured by how much DNA it contains, in base pairs. Chromosome 1 has about 249 million base pairs, more DNA than any other human chromosome, so it is the longest. The other options are shorter: chromosome 22 is among the smallest autosomes, chromosome X is a large sex chromosome but still shorter than chromosome 1, and chromosome 11 is also shorter. In short, chromosome 1 is the longest.

Length of a chromosome is measured by how much DNA it contains, in base pairs. Chromosome 1 has about 249 million base pairs, more DNA than any other human chromosome, so it is the longest. The other options are shorter: chromosome 22 is among the smallest autosomes, chromosome X is a large sex chromosome but still shorter than chromosome 1, and chromosome 11 is also shorter. In short, chromosome 1 is the longest.

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