Chemical analysis shows that a chromosome is composed of half protein and half nucleic acid. Which is true according to the material?

• A. True
• B. False
• C. Not specified
• D. Not true

Answer: (A)

The key idea is that chromosomes are complex structures made from both DNA and protein. Histone proteins help package the DNA into a compact form, and chemical analyses have shown these two components to be present in substantial, often roughly equal, amounts. So describing a chromosome as half protein and half nucleic acid reflects that balanced composition. This aligns with the material that chromosomes are a DNA-protein complex rather than DNA or protein alone, and since both components are present, the statement is true.