Which term describes a threadlike structure that carries genes and is visible in the nucleus during cell division?

Which term describes a threadlike structure that carries genes and is visible in the nucleus during cell division?

• A. Chromosome
• B. RNA
• C. Chromatin
• D. Nucleosome

Answer: (A)

During cell division, genetic material must be organized into structures that can be neatly separated. The threadlike entity that is visible in the nucleus and carries genes is a chromosome. Its condensed form packages the DNA so it can be accurately distributed to daughter cells, with each chromosome containing a specific set of genes in a linear order. RNA, on the other hand, is a nucleic acid involved in carrying instructions for protein synthesis, not the threadlike carrier seen during division. Chromatin refers to the less-condensed DNA-protein complex present most of the cell cycle; it condenses into chromosomes only as division begins. A nucleosome is a small unit of chromatin, consisting of DNA wrapped around histone proteins, not the larger, discrete threadlike structures observed during division.

During cell division, genetic material must be organized into structures that can be neatly separated. The threadlike entity that is visible in the nucleus and carries genes is a chromosome. Its condensed form packages the DNA so it can be accurately distributed to daughter cells, with each chromosome containing a specific set of genes in a linear order. RNA, on the other hand, is a nucleic acid involved in carrying instructions for protein synthesis, not the threadlike carrier seen during division. Chromatin refers to the less-condensed DNA-protein complex present most of the cell cycle; it condenses into chromosomes only as division begins. A nucleosome is a small unit of chromatin, consisting of DNA wrapped around histone proteins, not the larger, discrete threadlike structures observed during division.