Final answer:
Eukaryotic chromosomes contain DNA and proteins, particularly histones, which form chromatin. Lipids, carbohydrates, and RNA are not constituents of chromosomes.
Step-by-step explanation:
Eukaryotic chromosomes contain DNA as well as proteins, specifically histone proteins, which together form chromatin. This complex of DNA and protein is what allows chromosomes to maintain their structure and plays a crucial role in gene regulation. Lipids, carbohydrates, and RNA are not components of the chromosomes themselves, although RNA is a product of genetic expression from the DNA.