Uploaded on

Title* …

Title*
Tags

More in: Education
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
1,799
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
44
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. EUKARYOTIC CELLS Cell Wall
  • 2. Cell Wall
    • A cell wall is a rigid structure that gives support to a cell.
    • Plants and algae have cell walls made of complex sugar called cellulose.
    • Fungi including yeasts and mushrooms. Also have cell walls. Fungi have cell walls made of a complex sugar called chitin.
    • Prokaryotic cells such as bacteria and archaea have cell walls, but are different from plants.
  • 3. Cell Wall
  • 4. Cell Membrane
    • All cells have cell membrane. The cell membrane is a protective barrier that encloses a cell.
    • The cell membrane contains proteins, lipids and phospholipids.
    • Lipids (fats and cholesterol), do not dissolve in water.
  • 5. Cell Membrane
    • The cell membrane has two layers of phospholipids.
    • Phospholipid is a lipid that contains phosphorus.
    • Some of the proteins and lipids control the movement of materials into and out of the cell.
    • Nutrients and water move into the cell, and wastes move out of the cell, through these protein passageways.
  • 6. Cell Membrane
  • 7. Cytoskeleton
    • The cytoskeleton is a web of proteins in the cytoplasm.
    • Acts as both a muscle and a skeleton.
    • It keeps the cell´s membranes from collapsing, also helps some cells move.
    • Is made of three types of proteins.
    • One protein is a hollow tube, the other two are long, stringy fibers.
  • 8. Cytoskeleton
  • 9. Nucleus
    • The nucleus is a large organelle in a eukaryotic cell.
    • It contains cell´s DNA, or genetic material.
    • DNA contains the information how to make a cell’s proteins. Proteins control the chemical reactions in a cell, also support for cells and tissues.
  • 10. Nucleus
    • The nucleus is covered by two membranes .
    • The nucleus of many cells has a dark area called the nucleolus.
    • The nucleolus is where a cell begins to make its ribosomes.
  • 11. Nucleus
  • 12. Ribosomes
    • Organelles that make proteins are ribosomes.
    • Ribosomes are the smallest of all organelles.
    • Some ribosomes float freely in the cytoplasm.
    • Ribosomes are not covered by a membrane.
  • 13. Ribosomes
  • 14. Ribosomes
    • Proteins are made of AMINO ACIDS.
    • An AMINO ACID is any one of about 20 different organic molecules that are used to make proteins.
    • All cells need proteins to live.
    • All cells have RIBOSOMES.
  • 15. Endoplasmic Reticulum
    • The ENDOPLASMIC RETICULUM, or ER, is a system of folded membranes in which proteins, lipids, and other materials are made.
    • Its folded membrane contains many tubes and passageways.
  • 16. Endoplasmic Reticulum
    • Endoplasmic Reticulum is either rough ER or smooth ER.
    • The part of the ER covered in ribosomes is rough ER, it is usually found near the nucleus.
    • Ribosomes on rough ER make many of the cell’s proteins. The ER delivers these proteins throughout the cell.
  • 17. Endoplasmic Reticulum
    • ER that lacks ribosomes is smooth ER.
    • The functions of smooth ER include making lipids and breaking down toxic materials that could damage the cell.
  • 18. Endoplasmic Reticulum
  • 19. Mitochondria
    • Is the main power source of a cell.
    • It is the organelle in which sugar is broken down to produce energy.
    • Mitochondria is covered by two membranes (outer membrane, inner membrane).
  • 20. Mitochondria
  • 21. Mitochondria
    • Energy released by mitochondria is stored in a substance called ATP
    • (adenosine triphosphate).
    • Most eukaryotic cells have mitochondria.
    • Mitochondria are the size of some bacteria.
    • Mitochondria have their own DNA, and can divide within a cell.