Question

a chromosome is made up of how many DNA molecules ? -- 1 or numerous​

Answer 1

Answer:

$Two copies of chromosome 1, onecopy inherited from each parent, formone of the pairs. Chromosome 1 is the largest human chromosome, spanning about 249 million DNA building blocks (base pairs) and representing approximately 8 percent of the totalDNA in cells$

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Answer 2

Answer:

Explanation:

Chromosomal DNA consists of two DNA polymers that make up a 3-dimensional (3D) structure called a double helix. In a double helix structure, the strands of DNA run antiparallel, meaning the 5' end of one DNA strand is parallel with the 3' end of the other DNA strand.