DNA compaction into chromosomes is dependent upon a family of proteins called histones. These essential DNA organization proteins serve to package and organize DNA while ensuring that sections of DNA needed for transcription are readily available to the appropriate cellular machinery. Classify the statements as describing all histones classes, histone H1, histones H2A and H2B or histones H3 and H4.

Explanation:

The history protein H2A, H2B, H3 and H4 forms an octamer ( 2 each of the four histones) around which the DNA is wrapped. They help in packaging the DNA allowing for compaction of the DNA

Linker histone H1 and a length of DNA (linker DNA) links two nucleosomes together and they also play essential role in chromatin strucrure, stabilizing it and also modulating accessibility of the DNA to biological processes.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

most community's take hundreds of years to become stable