This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Components of chromosome area) DNAb) t RNAc) m RNAd) r RNAe) Histone 
Select and explain. 
A. ae, B. b, C. ab, D. ad
A: ae
Answer: A: ae 
Explanation: Nucleosomes are further arranged into increasingly more complex structures that organize into chromosomes.
Chromosomes are made up of DNA, histones, and non-histone protein.