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Prokaryotic Cell Structures

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niall highland

on 3 September 2013

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Transcript of Prokaryotic Cell Structures

Prokaryotic Cell and Structure
Cell Wall
Protects cell
Maintains the cells shape
Prevents cell from bursting
Cytoplasm
Fluid filling the space inside the membrane
Contains enzymes, and ribosomes
No membrane bound organelles
Chemical reactions of metabolism
Plasma Membrane
Thin layer composed of phospholipids
Partially permeable
Controls what enters and leaves the cell
Pumps substances in and out rhrough active transport
Pili
hairlike structures
used for cell adhesion
allow bacteria to stick together during conjugation when exchanging DNA
Ribosomes
Small granular structures
Synthesizes proteins
Flagella
Corkscrew like structures protruding from cell wall
Rotated to propel the cell
Nucleoid
Region of cytoplasm containing genetic material
DNA molecule circular and naked
Alot less DNA than eukaryotes
Less dense than rest of cytoplasm- less ribosomes and proteins
Prokaryotic Cell
Eukaryotic Cell
No Nucleus
Simplest Cell Structures
Bacteria
Everywhere
And very
small
Cells
Plasma Membrane
Golgi apparatus
Free Ribosome
Nucleus
Mitochondria
Lysosome
Rough Endoplasmic Reticulum
Cytoplasm
Plasma Membrane
Thin layer composed of phospholipids
Partially permeable
Controls what enters and leaves the cell
Pumps substances in and out rhrough active transport
Flattened membrane sacs called cisternae
Processes proteins brought in vesicles from rER
Appear as dark granules in cytoplasm
Synthesize proteins
Nuclear memberane is double and has pores
Stores almost all the genetic material
Where DNA is replicated and transcribed
Usually sperical or peanut shaped
Produce ATP for the cell- aerobic respiration
Spherical
formed from Golgi vesicles
High concentrations of proteins
Contain digestive enzymes
Break down food, organelles or the whole cell

Flattened sacs called cisternae
Attached are ribosomes
Synthesize proteins for secretion
Carried by vesicles (membrane sacs) to the Golgi apparatus
Eukaryotic Cell and Structure
Full transcript