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What is microbiology?
The study of very small living things
What microorganism categories have we studied?
- bacteria, fungi, protozoa
- viruses, viroids, prions
Which organisms are unicellular?
Which organisms are multicellular?
humans, fungi, helminths
Which organisms are acellular?
prions, viruses, viroids
What does "eukaryotic" mean?
Have a true nucleus and membrane enclosed organelles
Which organisms are eukaryotic?
humans, helminths, fungi, protozoa
Why is it harder to treat eukaryotic organisms?
Because their cells look a lot like ours, so medication can't distuiguish the two often
What does prokaryotic mean?
To have no true nucleus and no membrane enclosed organelles
How big is the average bacterium?
About 1/100th the diameter of human hair
What components make up bacteria?
- DNA and RNA, ribosomes, cytoplasm, cell wall
- (sometimes glycocalx capsule, axial fillaments or flagella)
How do bacteria reproduce?
What happens in binary fission?
- DNA or RNA forms a circle within the cytoplasm
- New cell membrane and cell wall forms
- Process continues until cell splits
What is a good thing about bacteria?
They can make antibiotics
What are two types of fungi?
yeast and mold
How are fungus infections cured?
What are 2 things good about fungi?
- Make antibiotics
What is used to treat protozoa infections?
What are ameobas?
What unicellular microorganism is motile?
Why are acellular organisms technically nonliving?
they do not have cells
What are viruses composed of?
- DNA or RNA
- protein coat "envelope"
What microorganism is an obligate intracellular parasite?
What gets inside a cell and forces the cell from withint to reproduce that microorganism?
obligate intracellular parasite
What are two differences between viruses and viroids?
- Viruses infect humans, viroids infect plants
- Viruses can have DNA or RNA, viroids have only RNA
What microorganism causes disease in plants only?
What are prions made of?
What microorganism causes transmissable spongiform encephalopathies?
What are four examples of prion diseases and what organism do they affect?
- Scrapie (sheep and goats)
- Mad cow disease (cows)
- V-CJD (people)
- Chronic waste (deer and elk)
What are helminths?