BIMM 120 CH 1
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What is the avg size of a microbe?
Where are microbes found?
What is an example of a supersize microbe?
What are the three domains?
bacteria, archaea, and eukarya
Which two domains are prokaryotic?
Bacteria and archaea
What is a metagenome?
collection of DNA sequences within an environment
How many DNA base pairs are in bacterial chromosome?
How many base pairs per gene?
What is an example of a biofilm?
bacteria on teeth
Are viruses living or non-living?
T/F - Archaea are known to cause disease
What are "rock-eating" bacteria?
- first compound light microscope
- coined the term "cell"
- first to observe single-celled microbes
- microbial basis of fermentation
- swan-neck flask
what is a bacterial colony?
clone of cells derived from same parent cell
1. microbe is always present in diseased host and absent in healthy individuals
2. microbe can be grown in pure culture and characterized
3. introduction of microbe into healthy host causes the original disease
4. same microbe is re-isolated from new host
antiseptic vs. antibiotic
antiseptic prevents bacterial growth whereas antibiotic kills and stops bacterial growth
completely pathogen free
What is the first commercial antibiotic and who discovered it?
How was virus discovered?
Tobacco Mosaic disease
discovered litotrophs using enrichment cultures
developed Winogradsky column
What do nitrogen fixers do?
Fix nitrogen to ammonium
microbes living symbiotically inside larger organism
What do rhizobia do?
induce the roots of legumes to form special nodules to facilitate bacterial nitrogen fixation
What were two early challenges in classifying microbes?
light microscopes too low resolution
microbial species are hard to define
What is the ancestor of chloroplasts?
What is the ancestor of mitochondria?
discovered archaea growing in hot springs that produced methane
What two instruments impacted cell structure?
BIMM 120 CH 1