Questions: True of false? Chromosomal DNA is complexed with proteins, which help to maintain the structure of the chromosome and can influence gene expression. True False

The answer is True: Chromosomal DNA is complexed with proteins, which help to maintain the structure of the chromosome and can influence gene expression.

Explanation:

• Chromosomal DNA is not found in isolation within the cell. It is associated with various proteins, primarily histones, to form a complex called chromatin.
• Histones help package the DNA into a more compact, organized structure, which is essential for fitting the large amount of DNA into the cell nucleus.
• The structure of chromatin can influence gene expression. For example, tightly packed chromatin (heterochromatin) is generally less accessible for transcription and thus less active in gene expression, whereas loosely packed chromatin (euchromatin) is more accessible and often associated with active gene expression.
• Other proteins, such as transcription factors and chromatin remodelers, also interact with chromosomal DNA to regulate gene expression.

In summary, the statement is true because proteins associated with chromosomal DNA play crucial roles in maintaining chromosome structure and regulating gene expression.