Question

eukaryotic chromosomes differ from bacterial chromosomes because only eukaryotes have

multiple choice

chromosomes in a nucleus
histone proteins
elongated, not circular, chromosomes
all of the choices are correct
several to many chromosomes

Explanation:

• Chromosomes in a nucleus: Eukaryotes have a membrane - bound nucleus that houses their chromosomes, while bacteria (prokaryotes) have a nucleoid region (not a true nucleus) for their genetic material.
• Histone proteins: Eukaryotic DNA is wrapped around histone proteins to form chromatin, which helps in packaging the DNA. Bacterial DNA is not associated with histones in the same way.
• Elongated, not circular, chromosomes: Most eukaryotic chromosomes are linear (elongated), while bacterial chromosomes are typically circular.
• Several to many chromosomes: Eukaryotes generally have multiple chromosomes (e.g., humans have 46 chromosomes), while bacteria usually have a single circular chromosome (though some bacteria may have additional smaller circular plasmids, but the main genetic material is in a single chromosome).

Answer:

All of the choices are correct.