DNA and chromosomes

DNA in prokaryotes:

• Shorter DNA molecules
• Form a circle called a plasmid
• Not associated with protein molecules
• Prokaryotic cells therefore don't have chromosomes

DNA in eukaryotes:

• Longer DNA molecules
• Form a line
• Associated with proteins called histones to form chromosomes
• Mitochondria and chloroplasts - contain DNA like in prokaryotes

Structure of chromosomes:

• Two threads joined at a single point - joined by…