Monera 1: Flashcards
What kingdom to bacteria belong to
Monera
Bacteria are..
Unicellular
Prokaryotes
No nucleus or membrane bound organelles
Three shakes of bacteria
Round
Rod
Spiral
Round
Cocci
Rod
Bacillus
Spiral
Spirillum
What do spiral bacteria cause
Pneumonia
Rod bacteria cause
Anthrax
E.coli
Escherichia coli
Lives in human gut
Spiral bacteria causes
Syphilis
What does bacteria need
Protection
What is a plasmid in bacteria
Circular piece of dna
Cytoplasm
Contains ribosomes and storage granules
Capusule
Protection
Flagella
Movement
Cell wall
Shape
Structure
Protection
When is the plasmid used
Genetic engineering
How to bacteria reproduce
Asexually
Bacteria reproduction is called
Binary fission
Explain what happens during BINARY FISSION
- DNA is replicated
- Cell elongates and the two DNA seperate
- Cell wall grows inward to divide the cell in two
- Two identical daughter cells are formed
Monera can be both of..
Autotrophic or heterotrophic
Photosynthetic bacteria
Use light energy to make food
Chemosynthetic bacteria
Use energy from chemical reactions to make food
Eh of chemosynthetic bacteria
Nitrifying bacteria that convert ammonia to nitrates in the nitrogen cycle
Saprophytic bacteria
Live off dead organic matter
Parasitic bacteria
Feed off living things
Parasitic bacteria cause..
Anthrax
Ex of autotrophic bacteria
Photosynthetic
Chemosynthetic
Ex of heterotrophic bacteria
Saprophytic
Parasitic
What happens to enzymes when conditions are not suitable
Denatured
Factors affecting growth of bacteria
Temperature
pH
Pressure
Oxygen concentration
Factors that slow down the process of bacteria growth are called..
Limiting factors
Temp bacteria grow well at
Between 20-30 deg C
High temps cause enzymes to be
Denatured
Unsuitable pH will cause enzymes to be
Denatured
Aerobic bacteria
Require oxygen for respiration
Anaerobic respiration
Do not require energy to respire
Facultative anaerobes
Can respire with or without oxygen (e.coli)
Obligate anaerobes
Can only respire in the absence of oxygen
What does Obligate anaerobes cause
Tetanus
What can bacteria gain or loose water by
Osmosis
What does bacteria form in unfavorable conditions
Endoscopes
Endospore formation
- Bacterial DNA replicates
- Cell shrink and rounds up
- Form a thick wall around DNA
Parent cell breaks down and the endospore remains dormant - When conditions are favorable, the endospore absorb water, break their walls and reproduce by binary fission
G M O
Genetically modified organisms
Beneficial bacteria
- Antibiotics can be formed by some microorganisms
- Bacteria in the colon help to produce vitamins B and K
- Bacteria are active in the carbon and nitrogen cycle and act as decomposers
Harmful bacteria
Pathogenic bacteria can cause diseases in animals and humans
Food spoilage
Tooth decay
Eg of pathogenic bacteria
Tubuerculosis
Bacteria’s offspring are
Genetically identical
Bacteria’s lifecycle is
Short
How does bacteria evolve to new antibiotics
New mutations
Antibiotics
Chemicals produced by micro organisms that stop the forth of other microorganisms without damaging human tissue
There are no cells in
Viruses
Antibiotics are used to control
Bacterial and fungal infections
Antibiotics do not effect
Viruses and
Who invented penicillin
Sir Alexander Fleming
How are antibiotics produced
By genetically engineering bacteria