Microbial growth and control

8 important questions on Microbial growth and control

Wat heeft glycaantetrapeptide nodig om over het cytoplasmamembraan getransporteerd te worden? 

bactoprenol

What is a divisome and what are its components?

Its a cell division apparatus and it consists of ftsZ, ZipA and ftsA.
MincD and minE inhibit ftsZ ring formation.

5 types of cell division?

- binary fission (equal)
- simple budding
- budding from hyphea
- cell division from stalked organisms
- polar growth without differentation
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3 components of peptidoglycan biosynthesis?

- Bactoprenol: carrier + insertor of precursors.
- Glycolases: insterts cell wall precursors+ catalyzes glycosidic bond formation
-Autolysins: makes a small opening starting at FtsZ ring

4 phases in the growth curve of a population of cells grown in a closed system?

- Lag phase: interval between inoculation and begin growth
- Exponential phase: growth at max rate
- stationary phase: growth rate is zero
- death phase: lysis + death

4 groups of microbes classified by temperature growth.

- psychrophile : low temp
- mesophile: midrange temp
- thermophile: high temp
- hyperthermophile: very high temp

3 groups of mo's based on pH.

- Acidophiles: grow best at a low pH (-6)
- Alkaliphiles: grow best at high pH (+9)
- Neutrophiles: grow best at pH between 6-9

4 groups of mo's based on solute concentration?

- non-halophiles: cannot grow at NaCl levels higher than 1%
- Halotolerant: grow best in absense of solute, but can also grow in presense.
- Halophiles: solute percentage between 5-10% required.
- extreme halophiles: requires solute percentage of 15-30%

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