Introduction To Mircobiology Flashcards
How does microbiology integrate into my course?
I will use microbiology in FDS202 - food microbiology, and FDS308, Food Technology learning about fermentation processes and aseptic techniques - food production, food preservation, and quality control of foods
What are some of the ways that microbes affect our lives?
SME are pathogenic - disease causing
Some decompose waster like organic or fix nitrogen - carbon and nitrogen recycling
Photosynthesis - making oxygen for other organisms
Industrial chemical
Fermentation foods and products
And make biotechnology products - human insulin, vaccines
What is the correct taxonomy for microorganisms?
Domain, kingdom, phylum, class, order, family, genus and species.
The first name begins with a capital and is a genus. The second name is the species/ specific epithet and begins with a lower case letter.
The name is given in 2 parts - binomial and together they make the scientific name. It is always italicised
What are the 7 groups of microorganisms?
Algae Archaea Animal parasites Bacteria Fungi Protozoa Viruses
List the characteristics of bacteria.
- Are prokaryotes
- Have peptidoglycan walls
- Reproduce by binary fission
- Energy - use organic chemical or photosynthesis
List the characteristics of archaea.
- Are prokaryotes
- Single celled
- Have pseudomurein cell walls
- Live in extreme environments
What are the 3 main types of archaea?
Methanogens - produce methane gas
- Extreme halophiles - high salt environments
- Extreme thermophiles - love high temperature
List the characteristics of fungi.
- Eukaryotes
- Chitin cell walls
- Use organic chemicals for energy
- Moulds and mushrooms and multicellular, composed of filaments called hyphae
- Most multicellular but yeasts are unicellular
List the characteristics of Protozoa.
- Eukaryotes
- Absorb or ingest organic chemicals
- Maybe motile via pseudopods, cilia or flagella
List the characteristics for algae.
- Eukaryotes
- Cellulose cell walls
- Use photosynthesis for energy
- Produce molecular oxygen and organic compounds
List the characteristics of multicellular animal parasites.
- Eukaryotes
- Multicellular animals
- Parasitic flatworms and rounds worms are called helminths
- Microscopic stages in lifecycle
Name the characteristics of viruses.
- Acellular
- Consist of DNA and RNA - not both
- Core is surrounded by a protein coat
- Coat may be enclosed in a lipid envelope
- Viruses replicated only when they are in a living host cell
List the 3 domains of life.
Bacteria Archaea Eukarya Introduced by Carl's Woese in 1978 Separate via ribosomal RNA sequence and their genomic sequence
Which group of microbes are prokaryotes?
Bacteria and archaea
Which groups of microbes and eukaryotes?
Multicellular worms , fungi, protozoans, algae
What is the importance of Robert Hooke?
1665 - used a crude microscope to view a slice of cork, coined the term cells. Start of cell theory
That all living things are composed of cells
What is the importance of Anton Van Leeuwenhoek?
1673 - observed the first microbes
Made a simple microscope to look at teeth scraping, faeces and pond water
First to see bacteria and Protozoa which he called animalcules
Spontaneous generation is?
The hypothesis that living organisms arise from non living matter. A vital force forms life
What is biogenesis?
The hypothesis that living organisms arise from preexisting life
What is the importance of Francesco Reid?
1668 - meat experiment and and raised controversy that air was important for spontaneous generation for life
What is the importance of John Needham?
Chicken broth experiment. No sterile containers. Theory supported spontaneous generation. Stated that it requires a vital force.
Lazzaro Spallanzani - stated that microbes fell into solution after they were boiled
What is the importance of Louis Pasteur?
- Swan neck flasks. Proved that living cells only arise from living cells
What is parasitology?
The study of Protozoa and parasitic worms
Who was the scientists to first come up with the concept “animalcules”?
Anton van Leeuwenhoek