Which statement about chromosomes is true?

• A. They are the sites of protein synthesis.
• B. They store genetic information in the nucleus.
• C. They carry thousands of genes and are located in the nucleus.
• D. They are the energy factories of the cell.

Answer: (C)

Chromosomes are the structures that carry genes and reside in the nucleus of eukaryotic cells. They are long DNA molecules packaged with proteins, and they contain thousands of genes that encode the information needed to make proteins and regulate cellular activities. This makes the statement about carrying thousands of genes and being located in the nucleus the most complete and accurate description.

Protein synthesis happens at ribosomes, not on chromosomes, so that option isn’t correct. Mitochondria are the energy factories, not chromosomes, so that option is also incorrect. While chromosomes do carry genetic information, the sharper, more informative description is that they carry thousands of genes and are located in the nucleus.