Lecture 7 - Growth PART TWO Flashcards
(101 cards)
in an obligate aerobe, where do the microbes stay in a broth tube?
they lay at the top, since the microbes really need oxygen.
do obligate aerobes create toxic waste products? if so, what do they do to get rid of it?
yes, they have enzymes in their cells for O2 detoxification.
in a facultative anaerobe, where do the microbes lay in a broth tube?
they stay everywhere in the tube, however since they prefer O2, there are some more microbes laying on the top next to the O2.
do facultative anaerobes create toxic waste products?
yes, they also have detoxifying enzymes.
in obligate anaerobes, where do the microbes lay?
they stay at the bottom of the broth tube, since they don’t like O2.
do obligate anaerobes create toxic waste products?
no
in microaerophiles, where do the microbes lay?
they lay close to the surface, but still leave a little space, since they like a little bit of O2.
do microaerophiles create toxic waste products?
yes, small amounts.
in aerotolerant organisms, where do the microbes lay in a broth tube?
they lay dispersed all over, since they can tolerate O2.
do aerotolerant organisms create toxic wast products?
yes
T/F: all microbes need energy and a carbon source - it just depends where the energy and carbon are sourced from.
True
what does an organic molecule consist of?
carbon and hydrogen
what are photoautotoph’s energy and carbon source?
-Solar (sun) energy source.
-CO2 (carbon dioxide) carbon source.
what are photoheterotroph’s energy and carbon source? what does the root hetero refer to?
-Solar energy source.
-Organic compounds carbon source (glucose, proteins).
Hetero = organic
what are chemolithoautotrophs energy and carbon source? what does the roots chemo and litho refer to?
-Inorganic compounds (H2, NH3) energy source.
-CO2 carbon source.
chemo = chemical.
litho = inorganic
what are chemoorganoheterotroph’s energy and carbon source? what does organo refer to?
-Organic compounds (sugars, amino acids) energy source.
-Organic compounds carbon souse.
Organo = organic
what components are needed for growth?
Major components (CHONPS) and trace elements
what category of the previous nutrients are humans in?
chemoorganoheterotrophs
what category of the previous nutrients are pathogens in?
chemoorganoheterotrophs
Describe an organism that:
-grows at body temperature
-thrives in acid
-can live with or without oxygen
-uses organic matter for both carbon and energy
-mesophile
-acidophile
-facultative anaerobe
-chemoorganoheterotrophs
what is the purpose of controlling microbe growth?
to reduce the chances of infections
what did Ignaz Semmelweis come up with?
After realizing doctors were infecting mothers from the bacteria from cadavers, Semmelweis prescribed “chlorine hand washing” to kill particles before operating on mothers - and it worked.
what do we now know was the name of the disease causing infection that killed mothers during childbirth?
Puerperal fever - infection of the uterus by Streptococcus pyogenes
what did Joseph Lister come up with?
he hypothesized that infected wounds would develop pus due to “minute organisms”. He started applying carbolic acid to wounds to kill these organisms and he saw that this practice prevented pus formation.
