It is packaged into thread-like structures.
DNA packaging. Each chromosome consists of one continuous thread-like molecule of DNA coiled tightly around proteins, and contains a portion of the 6,400,000,000 basepairs (DNA building blocks) that make up your DNA. The way DNA is packaged into chromatin is a factor in how protein production is controlled. Confidence votes 54. Yes, chromosomes are made of DNA and protein molecules called histones. Edit from another user: False, they're made of material called chromatin. Edit from user #3: Chromosomes and chromatin are actually the same thing, except in different form. Structure of chromosomes. The long string like structure that makes up a chromosome is made up of a chemical called deoxyribonucleic acid (DNA) . Each chromosome contains one DNA molecule. The DNA is coiled tightly around proteins called histones. Genes are made up of DNA. Each chromosome contains many genes. A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases. DNA and histone proteins are packaged into structures called chromosomes. In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing.
https://www.dnalc.org/resources/3d/07-how-dna-is-packaged-basic.html http://www.answers.com/Q/Are_chromosomes_made_of_molecules http://www.passmyexams.co.uk/GCSE/biology/what-are-chromosomes.html http://ghr.nlm.nih.gov/handbook/basics/gene http://ghr.nlm.nih.gov/handbook/basics/chromosome
what molecules make up chromosomes