MICROBIAL NUTRITION Flashcards
Why microorganisms need nutrients/food?
- to get energy (carbon source)
- For reproduction
- for growth and survival
- for metabolic function (anabolic and catabolic function)
list all of macronutrients
- C, H, O, N, S, P, K, Ca, Mg, Fe
what are the components that exist in cell as cations and play many roles.
there are 4 which are : K, Ca, Fe, Mg
what is the function of sulphur
- required for structural role in amino acids cys-te-in and me-thio-nine
- present in vitamins-thiamine, biotin, co-enzyme A
what nutrients is so important that without it enzyme cant work or produce
magnesium and potassium
what nutrients is important for the growth of marine organism
sodium
meaning of autotrophs
organism tht produce complex organic compound using carbon from simple subs as co2
meaning of heterotrophs
organism that cant produce its own food instead taking nutrients from other sources
meaning of mixotroph
a mixotroph is an organism that can combine different source of energy and carbon instead of having a single trophic mode on the continuum from complete autotrophy at one end to heterotrophy at the other.
similarity n difference between facilitated diffusion and active transport
both require carrier protein but active transport requires energy whereas facilitated diffusion doesn’t
name 3 molecules use passive diffusion to move across membrane
H20, O2, CO2
name 3 molecules use passive diffusion to move across membrane
glycerol, amino acid, sugars
explain about iron uptake
-ferric iron is insoluble so uptake is difficult
-to aid this uptake, microorganism use siderophore
-siderophore complexes with ferric iron
-complexes is then transported into cell
-fe3+ siderophore complex is then transported into cell
Define Culture Media
