Week 2 Microbiology Flashcards
Which is more likely to cause infections in humans ?
Mesophilic chemoheterotroph
A microbe can only grow only a the surface of solid media in a container in the dark. What best describes it.
An obligate aerobe
A cell organism with no mitochondria is likely to be?
A bacteria or archaeal cell
What dis Edward Jenner demonstrated ?
That cowpox induces protection against smallpox.
What is the lag phase on bacteria ?
No increase in bacteria.
What is the log phase?
Bacteria numbers are increasing exponientally
What is the stationary phase ?
Stop increasing and the cell death =cell division
A cells approximately 250 um in diameter, contains mitochondria and chloroplasts. This is most likely to be :
A unicellular algal cell
An average bacterial cell found in your gut is how long?
3000 nanometer
A microbe lives in the deep oceans where it uses occasional photon to drive its ATP production. It assimilates organic molecules from the environment for incorporating into its proteins. This is an example of a:
Photoheterotroph
A microbe grows near the surface of a hot spring and assimilates organic molecules to make into DNA. This is an example of:
Termophilic chemoheterotroph
If there are 100 microbial cells in a culture just entering log phase, and the generation time is 25 minutes, after how long will there be 10’5 organisms
Approximately 4 hours
