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Micro- Biology Chapter 5
chapter 5
13
Biology
Undergraduate 1
09/25/2013

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Term
psychrophiles
Definition

cold-loving

OG-below 15c

max growth temp below 20c

some can grow below 0c

Term
psychrotrops
Definition

optimal growth temp 22-26c

grow slowly as temp appr. 0c

 

Term
mesophiles
Definition

optimal growth b/w 25c-40c

human pathogens

Term
thermophiles
Definition
optimal growth temp above 45c
Term
hyperthermophiles
Definition

optimal growth above 70c

(Archaea)

Term
obligate aerobes
Definition
requires oxygen for growth at atmospheric oxygen level (21%)
Term
microaerophiles
Definition
requires oxygen for growth, but concentration below atmospheric level (21%)
Term
falcultative aerobes (anaerobes)
Definition
organisms use oxygen if present but dont have to
Term
aerotolerant anaerobes
Definition
grow in presence of oxygen but cannot use it
Term
obligate anaerobes
Definition
cannot grow when oxygen is present
Term
Acidophiles
Definition
growns when pH is below 5.4
Term
neutrophiles
Definition
optimal growth b/w 5.4 & 8.5
Term
alkaliphiles
Definition
pH optimal growth above 8.5
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