Threadlike structures made of DNA molecules that contain the genes are called what?

Threadlike structures made of DNA molecules that contain the genes are called what?

• A. Proteins
• B. Chromatids
• C. Chromosomes
• D. Nucleolus

Answer: (C)

Genes are carried on chromosomes, threadlike DNA-protein structures inside the cell nucleus. Chromosomes organize long DNA molecules into manageable units and provide the locations where gene sequences reside and can be passed on during cell division. Chromatids are the identical copies of a chromosome held together at the centromere during division, not the general gene-carrying structure. The nucleolus is the region inside the nucleus where ribosomal RNA is synthesized, not where genes are stored. So the term that fits describes chromosomes.

Genes are carried on chromosomes, threadlike DNA-protein structures inside the cell nucleus. Chromosomes organize long DNA molecules into manageable units and provide the locations where gene sequences reside and can be passed on during cell division. Chromatids are the identical copies of a chromosome held together at the centromere during division, not the general gene-carrying structure. The nucleolus is the region inside the nucleus where ribosomal RNA is synthesized, not where genes are stored. So the term that fits describes chromosomes.