Bacterial conditions for growth and requirements

Question 1

Studies the functions of living organisms and how those functions work

Answer 1

Physiology

Question 2

Self nourishing bacteria
-able to grow without the present of organic compounds
-obtain nutrition from carbon in CO2

Answer 2

Autotrophic bacteria

Question 3

organisms that must obtain their nourishment from complex organic matter
-several different types with varying requirements

Answer 3

Heterotrophic bacteria

Question 4

an organism that is completely dependent on it’s living hosts for survival

Answer 4

Obligate (strict) parasite

Question 5

an organism that prefers dead organic matter as a source of nutrition but can adapt to the use of living organic matter under certain conditions

Answer 5

Facultative parasite

Question 6

an organism that can survive only on dead or decaying organic matter

Answer 6

Obligate (strict) saprophyte

Question 7

An organism that prefers living organic matter as a source of nutrition but can adapt to the use of dead organic matter under certain conditions

Answer 7

Facultative saprophyte

Question 8

a microbe that can only live in the presence of free oxygen. Must have oxygen

Answer 8

Obligate (strict) aerobe

Question 9

a microbe that can survive only in the absence of free oxygen. Can’t have oxygen

Answer 9

Obligate (strict) anaerobe

Question 10

requiring very little free oxygen; as found with certain bacteria

Answer 10

Microaerophilic

Question 11

a microorganism that prefers an environment devoid of oxygen but has adapted so that is can live and grow in the presence of oxygen

Answer 11

Facultative aerobe

Question 12

an organism that prefers the presence of oxygen but is capable of living and growing in it’s absence

Answer 12

Facultative anaerobe

Question 13

-requirements vary and all species have maximum, optimum, and minimum requirements
-usually disease causing bacteria require a lot of moisture to grow
-molds and yeasts often require less moisture to grow

Answer 13

Moisture requirements

Question 14

temperature at which organisms grow best

Answer 14

Optimum temperature

Question 15

temperature below which bacterial growth will not take place

Answer 15

Minimum temperature

Question 16

temperature above which bacterial growth will not take place

Answer 16

Maximum temperature

Question 17

bacteria that prefers the cold, thriving at temperatures between 0C and 25C

Answer 17

Psychrophile

Question 18

bacteria that prefer moderate temperatures and develop best at temperatures between 25C and 40C

Answer 18

Mesophile

Question 19

bacteria that thrive best at high temperatures, between 40C and 70C

Answer 19

Thermophile

Question 20

-pH measures how acidic a substance is
-human body is slightly alkaline (basic)
-different bacteria can tolerate different pH levels

Answer 20

pH requirements

Question 21

-bacteria have various light requirements
-especially important for bacteria that convert light to food
-some light (UV) can destroy some bacteria

Answer 21

Light requirements