DNA that is circular and apart from the chromosome in a prokaryote is a(n)Multiple Choiceribosome.endospore.nucleus.nucleoid.plasmid.

Break Down the Problem

1. Identify what is being asked in the question.
2. Determine the correct term for circular DNA found in prokaryotes that is separate from the main chromosome.

Relevant Concepts

• In prokaryotic cells, the genetic material is typically a single circular chromosome.
• However, prokaryotes also contain small, independently replicating DNA molecules known as plasmids.

Analysis and Detail

1. Ribosome: It is a cellular structure involved in protein synthesis, not a form of DNA.
2. Endospore: This is a dormant, tough structure formed by some bacteria for survival, not DNA.
3. Nucleus: Eukaryotic cells contain a nucleus where the genetic material is stored; prokaryotes lack a nucleus.
4. Nucleoid: This refers to the region in a prokaryotic cell where the chromosome is located; it does not refer to extrachromosomal DNA.
5. Plasmid: These are small, circular DNA molecules found in prokaryotes that replicate independently of the chromosomal DNA.

Verify and Summarize

After analyzing the options, it's clear that the only term that accurately describes circular DNA apart from the chromosome in prokaryotes is plasmid.

Final Answer

The correct answer is plasmid.