6.5

Question 1

The Packaging of DNA in Eukaryotes

Answer 1

• DNA is wound around histon proteins
• +vly charged histones are
  attracted to -vly charged DNA
• DNA wrapped around 8 histons = nucleosomes

6 nucleosomes = soloneids

Soloneids are super colloid into x-shaped chromosomes

Question 2

Prokaryotic DNA Organization

Answer 2

• Contains only one circular chromosomes
• No nuclear membrane = easy access
• Plasmids (smaller peices of DNA) flot throughout cell
• Conjugation allows plasmids
  to exit one cell and enter
  another
• They use a supercoiling
• twisting of DNA to
  reduce volume

Question 3

Telomeres: A key difference

Answer 3

• DNA replication results in small amounts
  of lost DNA after each replication (on the
  lagging strand)
• Telomeres
• Repetitive and non-coding sequences
  of DNA at the end of a chromosome
• Protects coding regions (important
  parts of DNA) from being lost during
  replication