Which of the following best describes the primary components that make up chromosomes in eukaryotic cells?

• A. RNA and phospholipids
• B. DNA and proteins (mainly histones)
• C. Polysaccharides and lipids
• D. Amino acids and fatty acids

Answer: (B)

Verified step by step guidance

1. Understand that chromosomes in eukaryotic cells are structures that carry genetic information.
2. Recall that chromosomes are primarily composed of DNA, which contains the genetic code, and proteins that help package and organize the DNA.
3. Identify the main proteins involved, which are histones; these proteins help DNA coil tightly to fit inside the nucleus.
4. Recognize that RNA, phospholipids, polysaccharides, lipids, amino acids, and fatty acids are not the primary structural components of chromosomes.
5. Conclude that the best description of the primary components of eukaryotic chromosomes is DNA and proteins (mainly histones).