Unit 3 Culturing Microorganisms/growth Cycle Flashcards
Require certain essential macro and micronutrients to grow.
Microorganisms
Evolve in response to nutrient availability.
Microbial genomes
Lose metabolic pathways provided by their hosts and develop requirements for growth factors supplied by the hosts.
Obligate intracellular bacteria
Autotrophs use CO2 as a carbon source, either through photosynthesis or through lithotrophy.
Global carbon cycle
Make complex organic compounds that are consumed by heterotrophs.
Autotrophs
Contribute to the nitrogen cycle.
Nitrogen fixers, nitro diets, and denitrifiers
Move nutrients across semipermeable membranes.
Transport systems
Helps solutes move across a membrane from a region of high concentration to one of lower concentration.
Facilitated diffusion
Use the energy from ATP hydrolysis to move solutes “uphill” against their concentration gradients.
ABC transporters
Are secreted to bind ferric iron and transport it into the cell.
Siderophores
Contain only those nutrients essential for growth.
Minimal defined media
Contain many nutrients.
Complex or rich media
Defined as being capable of replicating and forming a colony on a solid-medium surface.
Viable bacterial organism
The process of going through the lag, log, stationary, and death phase.
The growth cycle
Complex multicellular surface-attached microbial communities.
Biofilms
