A nucleosome consists of
Understand the Problem
The question is asking us to identify the components of a nucleosome, which is a fundamental unit of chromosome structure consisting of DNA wrapped around histone proteins.
Answer
A nucleosome consists of DNA wrapped around a histone octamer.
A nucleosome consists of around 146 base pairs of DNA wrapped around a histone octamer, which is made of two copies each of the histones H2A, H2B, H3, and H4.
Answer for screen readers
A nucleosome consists of around 146 base pairs of DNA wrapped around a histone octamer, which is made of two copies each of the histones H2A, H2B, H3, and H4.
More Information
The histone octamer is the main structural unit for organizing DNA within the nucleus, enabling efficient storage and protection. This organization also regulates access to DNA for processes like replication and transcription.
Tips
One common mistake is to confuse the histone octamer with individual histone proteins. It is important to remember that a nucleosome includes DNA and the histone octamer, not just the histones.
Sources
- Nucleosome - National Human Genome Research Institute - genome.gov
- Nucleosome - Wikipedia - en.wikipedia.org
- A Brief Review of Nucleosome Structure - PMC - PubMed Central - pmc.ncbi.nlm.nih.gov
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