Unit 3 - Microbial Physiology & Genetics Flashcards
the study of the life processes
of microorganisms.
Microbial Physiology
refer to various chemical compounds that
organisms and microorganisms use to sustain life.
Nutrients
6 Major chemical elements:
carbon • hydrogen • oxygen • nitrogen • phosphorus • sulfur
Other elements needed in lesser amount:
Sodium • Potassium • Chloride • Magnesium • Calcium • Iron • Iodine
carbohydrates, fats, protein
Organic
carbon dioxide, phosphate, nitrates
Inorganic
Energy Source
Phototrophs . Chemotrophs
use light as an energy source.
Phototrophs
process by which organisms convert light
energy into chemical energy.
Photosynthesis
use either inorganic or organic chemicals as energy.
Chemotrophs
use carbon dioxide(co2) as carbon source. E.G. Plants and algae
Autotrophs
use organic compounds as carbon source.
e.g. humans, animals, protozoa, fungi
Heterotrophs
Photoautotrophs
use light as energy source and CO2
as carbon source.
e.g. plants, algae, green sulfur bacteria
use light as energy source and
organic compound as carbon source.
Photoheterotrophs
use chemicals as an energy source and CO2 as carbon source.
e.g. nitrogen fixing bacteria, sulfur bacteria
chemoautotrophs
