Microbial Growth

Question 1

What are three types of Microbial Division

Answer 1

Binary Fission, Budding, Multiple Fission

Question 2

The time it takes a cell to divide

Answer 2

Generation time

Question 3

What are the 3 requirements for growth

Answer 3

energy, materials, appropriate conditions

Question 4

Most pathogenic bacteria fall into this category of energy source

Answer 4

Chemoheterotrophs (energy from organic compounds)

Question 5

Organisms that require oxygen to live

Answer 5

Obligate Aerobes

Question 6

Organisms that require a low dose of oxygen

Answer 6

Microaerophiles

Question 7

Organisms that can tolerate no oxygen, but would prefer it

Answer 7

Facultative Anaerobes

Question 8

Organisms that require the absence of oxygen

Answer 8

Obligate Anaerobes

Question 9

Organisms that can’t use oxygen but can tolerate it

Answer 9

Aerotolerant Anaerobes

Question 10

Agent used to gather free iron (limiting reagent in growth)

Answer 10

Siderophore

Question 11

4 environmental conditions that affect growth

Answer 11

temperature, pH, pressure, other organisms

Question 12

Type of of organisms that live in us (in terms of temperature)

Answer 12

Mesophiles

Question 13

Tolerates high salt concentrations

Answer 13

Halophiles

Question 14

Tolerates high sugar concentrations

Answer 14

Osmophiles

Question 15

Tolerates desiccating conditions (lack of water)

Answer 15

Xerophiles

Question 16

Tolerates intense pressure

Answer 16

Piezophiles

Question 17

Communities of microorganisms that are bound by a thick matrix. Used for life cycle or survivals advantage

Answer 17

Biofilms

Question 18

Depict the amount of bacteria in a population over time

Answer 18

Bacterial Growth Curves

Question 19

Allows for a chemically controlled system of microbial growth

Answer 19

Chemostat

Question 20

Phase of growth curve with little to no cell division

Answer 20

Lag Phase

Question 21

Phase of growth curve when bacteria divide logarithmically

Answer 21

Log Phase

Question 22

Growth phase where population remains stable. growth = death

Answer 22

Stationary Phase

Question 23

Growth phase where population decreases

Answer 23

Death Phase

Question 24

Growth phase where dying cells release nutrients

Answer 24

Prolonged decline phase