Prokaryotic Cells

Prokaryotic & Eukaryotic Cells

Bacteria

• Oldest living organisms

• 100x more Bacteria genes in you & on you than human genes

• Help us stay health, digest out food, make us vitamins

Poll

Which of these "bad" bacterial diseases have you heard of?

• Lyme Disease

• Toxic Shock

• Food Poisoning

• Ulcers

• Cholera

Open Ended

Bacteria are the oldest living organisms. Give an example from the video of Bacteria showing a Characteristic of Life.

A Prokaryotic Cell

• Unicellular

• No Nucleus

• No Membrane-bound organelles

• ONLY BACTERIA

• Do Have: Plasma membrane, ribosomes, DNA/Chromosome, cytoplasm, cell wall

Bacteria Respond to their Environment

• Bacteria talk to each other with a chemical language

• When the stimuli is high enough they turn on their light - Bioluminescence

• Symbiotic relationship with the Hawaiian bobtail squid

• Adaptation - shutter to allow different amount of bacterial light out

Multiple Choice

Which type of symbiotic relationship do the Squid & bacteria have?

• Parasitism

• Commensalism

• Mutualism

Important Cellular Structures

• DNA/Chromosome - genetic material

• Plasma membrane - encloses & contains the cell contents

• Cytoplasm - gel-like substance where metabolism occurs

• Ribosomes - site of protein production

• Cell Wall - out protective barrier, what antibiotics attack