What describes a chromosome?

What describes a chromosome?

• A. A single gene
• B. A DNA protein complex that is organized in a compact manner which permits the large amount of DNA to be stored in the nucleus
• C. A lipid bilayer
• D. A ribosome

Answer: (B)

Chromosomes are DNA wrapped with proteins in a tightly organized way to fit the large length of DNA inside the nucleus. The DNA double helix is wrapped around histone proteins to form nucleosomes, which then coil and fold into higher-order structures that become highly condensed during cell division. This packaging is essential for storing the genome efficiently and ensuring accurate replication and segregation of genetic material when cells divide. A gene is a small functional unit found on chromosomes, not the whole chromosome itself. A lipid bilayer describes the cell membrane, and a ribosome is the molecular machine that builds proteins from mRNA, neither of which define a chromosome.

Chromosomes are DNA wrapped with proteins in a tightly organized way to fit the large length of DNA inside the nucleus. The DNA double helix is wrapped around histone proteins to form nucleosomes, which then coil and fold into higher-order structures that become highly condensed during cell division. This packaging is essential for storing the genome efficiently and ensuring accurate replication and segregation of genetic material when cells divide. A gene is a small functional unit found on chromosomes, not the whole chromosome itself. A lipid bilayer describes the cell membrane, and a ribosome is the molecular machine that builds proteins from mRNA, neither of which define a chromosome.