Ultrasound - organelles

• What is the function of the nucleus in a cell?

  It contains chromatin and the nucleolus, and is surrounded by a nuclear envelope with pores.
• What is chromatin made of?

  Chromatin is usually made from DNA and proteins.
• What is a lysosome?


  A lysosome is a round organelle surrounded by a membrane that contains digestive enzymes.
• What is the primary function of lysosomes?

  Lysosomes break down worn parts of cells using digestive enzymes.
• What is a ribosome?


  A ribosome is a very small organelle that carries out protein synthesis and can float free in the cytoplasm or be attached to the rough endoplasmic reticulum.
• What is the composition of ribosomes?

  Ribosomes are made up of proteins and RNA and have no membrane.
• What does RER stand for?

  RER stands for rough endoplasmic reticulum.
• What is the role of the rough endoplasmic reticulum (RER)?

  The RER is involved in folding and processing proteins that enter it.
• How do proteins move from the RER to the Golgi apparatus?

  Proteins are transported to the Golgi apparatus in vesicles.
• What does SER stand for?

  SER stands for smooth endoplasmic reticulum.
• What is the primary function of the smooth endoplasmic reticulum (SER)?


  The SER makes and processes lipids.