nucleus

• the nucleus is composed of nuclear envelope which is outside the nucleus and is a double membrane structure
• the nucleus contain nuclear pores which allow molecules like mRNA to leave the nucleus
• inside the nucleus is nuclear plasm which is a jelly like substance that holds the nucleus together
• the nucleus contains chromosomes which are protein bound DNA
• nucleus contains the nucleolus which is a small sphere where ribosomes and RNA are made
• function of nucleus

  • site of DNA replication and transcription
  • site of protein synthesis
  • contains genetic code for the cell