Ch 4 - Nutrition, Culture, and Metabolism of Microorganisms Flashcards Preview

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Flashcards in Ch 4 - Nutrition, Culture, and Metabolism of Microorganisms Deck (51)
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1

The sum total of all chemical reactions that occur in a cell

metabolism

2

Energy-releasing metabolic reactions

catabolic reactions

3

Energy-requiring metabolic reactions

anabolic reactions

4

iron under anoxic conditions, exist in which form (Fe2+/Fe3+) and (soluble/insoluble).

Fe2+ and soluble

5

iron under oxic conditions, exist in which form (Fe2+/Fe3+) and (soluble/insoluble).

Fe3+ and insoluble

6

these iron-binding agents obtain iron from insoluble mineral form

siderophores

7

a culture media where precise chemical composition is known

Defined media

8

a culture media composed of digests of chemically undefined substances

complex media

9

culture containing only a single kind of microbe

pure culture

10

unwanted organisms in a culture

contaminants

11

unit of measurement for energy

kJ

12

energy released that is available to do work

free energy

13

change in free energy during a reaction

delta G0′

14

Reactions with a negative delta G0′ release/require free energy

release

15

Reactions with a positive delta G0′ release/require energy

require

16

Reactions with a negative delta G0′ release free energy

exergonic

17

Reactions with a positive delta G0′ require energy

endergonic

18

free energy that occurs under actual conditions

delta G

19

delta G =

delta G0′ + RT ln K

20

energy required to bring all molecules in a chemical reaction into the reactive state

activation energy

21

substance that Lowers the activation energy of a reaction

catalyst

22

substance that Increases reaction rate

catalyst

23

Are enzymes generally larger or smaller than the substrate?

larger

24

region of enzyme that binds substrate

ACTIVE SITE

25

cleaves peptidoglycan

lysozyme

26

non protein molecules that bind tightly to enzymes

prosthetic group

27

non protein molecules bound loosely to enzymes

coenzymes

28

redox reactions occur in two ____ ______.

half reactions

29

the substance oxidized in a redox reaction

electron donor

30

the substance reduced in a redox reaction

electron acceptor