Chapter 3 Vocab

Card Set Information

Chapter 3 Vocab
2012-11-29 22:09:02
science chapter three vocab

Vocab words for Chapter 3
Show Answers:

  1. What is a cell?
    The smallest unit that can perform all the processes necessary for life.

  2. What is a cell membrane?
    A protective layer that covers the cell’s surface and acts as a barrier.

  3. What is an organelle?
    Structures that perform specific functions within the cell.

  4. What is a nucleus?
    Where DNA is enclosed in a cell.

  5. What is a prokaryote?
    Single-celled organisms that do not have a nucleus or membrane-bound organelles.

  6. What is a eukaryote?
    Organism made of eukaryotic cells.

  7. What is the cell theory?
    • •All organisms are made of one or more cells.
    • •The cell is the basic unit of all living things.
    • •All cells come from existing cells.

  8. What is a ribosome?
    The smallest organelles that make proteins.

  9. What is a flagellum?
    Helps bacteria move.

  10. What is a cell wall?
    A rigid structure that gives support to a cell.

  11. What is an endoplasmic reticulum?
    A system of folded membranes in which proteins, lipids, and other materials are made.

  12. What is a mitochondrion?
    The organelle in which sugar is broken down to produce energy.

  13. What is the Golgi complex?
    The organelle that packages and distributes proteins.

  14. What is a vesicle?
    A small sac that surrounds material to be moved into or out of a cell.

  15. What is a lysosome?
    Organelles that contain digetstive enzymes.

  16. What is a cytoskeleton?
    A web of proteins in the cytoplasm.

  17. What is a cytoplasm?
    Fluid inside a cell and almost all of its contents.

  18. What is a chloroplast?
    Organelles in plant and algae cells in which photosynthesis takes place.

  19. What is a vacuole?
    Organelles that store water and other liquids.

  20. What is a nucleolus?
    Where a cell begins to make its ribosomes.

  21. What is tissue?
    A group of cells that work together to perform a specific job.

  22. What is an organ?
    A structure that is made up of two or more tissues working together to perform a specific function.

  23. What is an organ system?
    A group of organs working together to perform a particular function.

  24. What is an organism?
    Anything that can perform life processes by itself.

  25. What is a structure?
    The arrangement of parts in an organism.

  26. What is a function?
    The job an organism's structure does.