The Microbial World and You Flashcards
Living things too small to be seen with the unaided eye are called
microorganisms
microbes
bacteria, fungi, protozoa, microscopic algae and viruses, archaea, multicellular animal parasites
benefits of microbes
generate oxygen by photosynthesis
produce products used in manufacturing and disease treatment
Fermentation
Bioremediation
Prokaryote Microorganisms
bacteria and archaea
Eukaryote Microorganisms
fungi, protozoa, algae
Three domains
bacteria, archaea and eukarya
bacteriology
study of bacteria
mycology
study of fungi
parasitology
study of protozoa and parasitic worms
immunology
study of immunity
virology
study of viruses
cell theory
all living things are composed of cells
Robert Hooke
biogenesis
living cells come from preexisting living cells
Rudolf Virchow
spontaneous generation
life comes from nonliving matter
father of microbiology; first to observe microorganisms under a microscope
anton van leeuwenhoek
performed surgery under aseptic conditions using phenol; proved microbes caused surgical wound infections
joseph lister
showed that life did not arise from nonliving matter
showed that microbes are responsible for fermentation
louis pasteur
created experimental steps to link a specific microbe to a specific disease
robert koch
Drawbacks of Microbes
can be disease producing
Bacteria
prokaryotes
single celled
divide by binary fission
peptidoglycan cell walls
derive nutrition from organic or inorganic photosynthesis
Archaea
prokaryotes
no peptidoglycan cell walls
live in extreme environments
Fungi
eukaryotes
chitlin cell walls
absorb organic chemicals for energy
unicellular= yeast
molds and mushrooms= multicellular
Protozoa
eukaryotes
absorb or ingest organic chemicals
free-living or parasitic
move using pseudopods, cilia or flagella
Algae
eukaryotes
cellulose cell walls
in freshwater, saltwater, or soil
photosynthesis for energy
produce oxygen and carbohydrates
Viruses
acellular
DNA or RNA core
Core surrounded by protein coat
Coat can be enclosed by lipid envelope
Must live in host cell to replicate
chemotherapy
treatment of disease with chemicals
antibiotics
chemicals made by bacteria or fungi that stop or kill other microbes
developed a synthetic arsenic drug to treat syphilis; magic bullet
Paul Ehrlich
biotechnology
using microbes for practical reasons such as food and chemical production
recombinant DNA technology
lets bacteria and fungi create a variety of proteins, vaccines and enzymes
gene therapy
replace missing or defective genes in human cells
bacillus thurigeiensis
fatal infection in many infects
microbial ecology
the study of the relationship between microorganisms and their environment
microbial genetics
study of how microbes inherit traits
molecular biology
study of how DNA directs protein synthesis
genomics
study of an organism’s genes; provides new tools for classification
recombinant DNA
DNA made from two different sources
Paul berg: inserted animal DNA into bacterial DNA= produced animal protein
Alexander Fleming
discovered the first antibiotic, penicillin from penicillium fungus
pasteurization
applying high heat for a short time to kill harmful bacteria in beverages
fermentation
microbial conversion of sugar to alcohol in the absence of air
Algae include
methanogens, extreme halophiles and extreme thermophiles
fungi can be either
unicellular or multicellular
all protozoa are
unicellular
viruses are not
alive because they cannot reproduce on their own