Cell structure

• What is the typical length range of animal cells?


  10-30 µm
• What is the function of the nucleus in an animal cell?

  It controls all activities of the cell and contains genes for protein synthesis.
• Where does protein synthesis take place in an animal cell?

  in the ribosomes
• What is the role of the cell membrane in an animal cell?

  It controls the passage of substances into and out of the cell.
• What is the function of the cytoplasm in an animal cell?


  It is a liquid gel where organelles are suspended and most chemical reactions take place.
• Where does aerobic respiration take place in an animal cell?


  In the mitochondria, which are 1-2 µm in length.
• How do plant cells produce their own food?

  Through photosynthesis.
• What is the typical length range of plant cells?


  10-100 µm
• what is the function of chloroplasts in a plant cell?

  It contains chlorophyll, which absorbs light for photosynthesis.
• What is the composition of the cell wall in a plant cell?

  It is made of cellulose, which strengthens and supports the cell.
• What is the role of the vacuole in a plant cell?


  It is filled with cell sap and helps keep the cell rigid to support the plant.
• What are examples of eukaryotic cells?


  Animal and plant cells.
• What do all eukaryotic cells contain?


  A cell membrane, cytoplasm, and DNA in a nucleus.
• What are examples of prokaryotic cells?


  Bacteria.
• What is the typical length range of prokaryotic cells?


  0.2 - 2.0 µm
• How are prokaryotic cells typically observed?


  They are only visible to the human eye when cultured on an agar plate.
• What does the prokaryotic cells contain

  cytoplasm, cell membrane
• What is the function of the cell membrane in prokaryotic cells?


  It acts as a barrier that controls the movement of substances in and out of the cell.
• What is the composition of the cell wall in prokaryotic cells?

  It does not contain cellulose.
• What is the bacterial chromosome in prokaryotic cells?

  It is a single DNA loop found free in the cytoplasm.
• What is the function of the flagellum in prokaryotic cells?


  It is a long protein strand that helps the cell move.
• Are flagella always present in prokaryotic cells?


  No, they are not always present.