Certain proteins, called histones, act as spools, which wind up small stretches of DNA. Other proteins (including other histones) stabilize and support these spools, making a complex network of DNA coils and proteins.
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A centromere and a pair of sister chromatids
Chromosomes are made of a single strand of DNA. There are also some proteins that are bound to this DNA in order to manage it and keep it coiled, these are also sometimes referred to as part of the chromosome.
A single molecule of DNA consists of a double helix structure made up of nucleotides. Associated proteins, such as histones, help package and organize the DNA into chromatin. Together, the DNA and proteins form chromosomes within the nucleus of a cell.
The second statement would be more correct.
DNA and proteins called histones
A chromosome is a mix of tightly packed DNA and proteins.
At the beginning of cell division, DNA and the proteins associated with the DNA coil into a structure called a chromosome. Chromosomes are visible under a microscope and contain the genetic material (DNA) of an organism.
chromosome
DNA and proteins (such as histones).
By proteins called histones.
DNA and proteins are what a chromosome is mostly comprised of. The DNA serves as code and instructions for the organism, almost like a recipe.
A centromere and a pair of sister chromatids
Chromosomes are made of a single strand of DNA. There are also some proteins that are bound to this DNA in order to manage it and keep it coiled, these are also sometimes referred to as part of the chromosome.
A single molecule of DNA consists of a double helix structure made up of nucleotides. Associated proteins, such as histones, help package and organize the DNA into chromatin. Together, the DNA and proteins form chromosomes within the nucleus of a cell.
The second statement would be more correct.
chromosome
DNA and proteins called histones