Somewhat the difference between a brick and a brick wall. Chromosomes are made up of DNA molecules collected in units called genes ( leaving all else aside ) with attendant proteins, such as the histone proteins DNA wraps around.
DNA molecules
Just before mitosis, a chromosome consists of two sister chromatids joined by a centromere. Each sister chromatid contains one DNA molecule. Therefore, there are two DNA molecules in a chromosome just before mitosis.
2 DNA molecules College Biology Chapter 9
There is one double helix DNA molecule per chromosome.
Chromosome.
chromosome
The difference between a chromosome and a DNA molecule is that a chromosome is a single DNA molecule associated with proteins and a DNA molecule is a long thin molecule that stores genetic information.
DNA molecules appear in the chromosome as tightly coiled structures called chromatin. The DNA is wrapped around proteins called histones, forming nucleosomes. The nucleosomes are then packaged together into a more condensed structure known as chromatin, which ultimately makes up the chromosome.
The DNA molecules in various combinations form the genes which are the genetic code of a chromosome.
At the end of S phase, each chromosome has two coiled DNA molecules, also known as sister chromatids. These sister chromatids are identical copies of each other formed during DNA replication in preparation for cell division.
A chromosome in humans is made up of one long DNA molecule. This DNA molecule is double-stranded and contains thousands of genes.
DNA, each chromosome is 2 quite easily visible molecules under light microscope.