Chapter 6/13: Nutrients & Environmental Factors Flashcards Preview

MIBO3500 > Chapter 6/13: Nutrients & Environmental Factors > Flashcards

Flashcards in Chapter 6/13: Nutrients & Environmental Factors Deck (24):
0

What two main groups of nutrients do microbes need?

Macronutrients, Micronutrients

1

What elements comprise macronutrients?

C, N, P, S, O

2

What is the function of macronutrients?

Build cellular structures

3

What elements comprise micronutrients?

Na, Mg, Mn

4

What are micronutrients required for?

Catalytic activity (co-factors)

5

What is a minor function of micronutrients?

Build cellular structures

6

Which cardinal names are used for distinguishing an organism's carbon source?

Heterotrophs, Autotrophs

7

Which cardinal names are used for distinguishing an organism's electron source?

Organotroph, Lithotroph

8

Which two cardinal names are used to distinguish an organism's energy source?

Phototroph, Chemotroph

9

What is the name for self-sufficient organisms that can synthesize all needed precursors from one carbon source and inorganic molecules?

Prototrophs

10

What is the name for organisms that cannot synthesize all needed precursors from a single carbon source?

Auxotrophs

11

What term describes organisms that must have nutrient supplements?

Fastidious

12

What term describes the lowest available nutrient content that allows for cell growth?

Limiting factor

13

What type of organisms require oxygen at atmospheric levels?

Obligate aerobes

14

What type of organisms require oxygen and grow best with reduced oxygen?

Microaerophiles

15

What type of organisms do not use oxygen and are not harmed by it?

Aerotolerant anaerobes

16

What type of organisms cannot grow when oxygen is present?

Obligate anaerobes

17

What type of organisms can use oxygen but also grow in the absence of oxygen?

Facultative anaerobes

18

What cardinal group grows best at pH below 5.5?

Acidophiles

19

What cardinal group grows best at pH 5.5 to 8.5?

Neutrophiles

20

What cardinal group grows best at pH above 8.5?

Alkalophiles

21

What two things in a cell does pH affect?

Proteins, PMF

22

What type of reactions are dependent on water?

Hydrolysis reactions

23

Which molecule's formation is dependent on hydrolysis reactions?

ATP