Which chromosome is the longest in humans?

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Prepare for the PLTW Biomedical Science Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for 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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