Cell Structure and
Functions
Prokaryotic and
Eukaryotic cell
Cell are grouped into tissue
Cell as a unit of life
Prokaryotic and eukaryotic cells
Structure and functions: cell membrane
Microscopic
and structures of organelles plant and animal cell
Cell prokaryotic theory eukaryotic Plasma membrane Organeles
- Nucleus
- mitochondria
Plant cell Animal cell - ruogh and smooth endoplasmic reticulum
-Golgi body
--ribosome
--lysosome
compare
--chloroplast
--centriole
animal plant
Cell transport
Passive
transport
Active transport …
Cell Theory
CELL
The Cell Theory
Schleiden
1. All living things are composed of cells.
2. Cells are the basic units of structure and function in living things. 3. New cells are derived from existing cells by cell division.
4. Cell contain the hereditary material of an organism which is passed from parent cell to daughter cell.
Schwann
Virchow
Prokaryotes and Eukaryotes
• Nucleus – large membraneenclosed structure that contains the cell’s genetic information.
• Prokaryotes – cells that do not contain nuclei. (Bacteria)
• Eukaryotes – cells that contain nuclei. (All other organisms)
Types of cells
“before the nucleus.” “True nucleus”
i. Prokaryotic cell
ii. Eukaryotic cell
a. Plant cell
b. Animal cell
Comparison
2.1 Prokaryotic & eukaryotic cells…
Prokaryotic cell
• No nucleus
• A prokaryote is a single-celled organism • Very small : 0.5 - 10 μm
(micrometers)
• No membrane-bound organelles and
• has a single circular chromosome. “before the nucleus.”
The Prokaryotic cell – Bacteria
Structure
&
Function
Structure of prokaryotic cell
Single, circular
DNA
Pili
Ribosome
Flagellum
Capsule
Cell Wall
Nucleoid
Plasma membrane Structure of prokaryotic cell
Pili
Single, circular DNA
No nuclear membrane Ribosome
Flagellum
Capsule
Cell Wall
Nucleoid
Plasma membrane dense region of DNA in prokaryotic cell
Structure of prokaryotic cell
Single, circular
DNA
Pili
Ribosome
Flagellum
Capsule