Lecture 14 - Ch 13 & 14 - Metabolic Pathways Flashcards Preview

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Flashcards in Lecture 14 - Ch 13 & 14 - Metabolic Pathways Deck (32)
1

the conversion of light energy to chemical energy

photosynthesis

2

carry out photosynthesis

phototrophs

3

Photosynthesis requires light-sensitive pigments called

chlorophylls

4

Photoautotrophy requires _____ production and _____ reduction

ATP & CO2

5

Oxidation of H2O produces O2

oxigenic phtotsynthesis

6

oxygen not produced

anoxygenic photosynthesis

7

participate directly in the conversion of light energy to ATP

reaction centers

8

funnel light energy to reaction centers

antenna pigments

9

accessory pigments that absorb energy to be transferred to the reaction center (found in phototrophic organisms)

carotenoids

10

organisms that obtain energy from the oxidation of inorganic compounds

chemolithotrophs

11

chemolithotrophs that require organic carbon as a carbon source

mixotrophs

12

is Hydrogen Oxidation aerobic or anaerobic?

anaerobic

13

process where ferrous iron oxidizes to ferric iron

iron oxidation

14

Two groups of bacteria work in concert to fully oxidize ammonia to nitrate

nitrification

15

steps to nitrification of ammonia-oxidizing bacteria

ammonia --> NH2OH

16

steps to nitrification of nitrite-oxidizing bacteria

nitrite (NO2) --> nitrate (NO3)

17

Fixes CO2 into cellular material for autotrophic growth

calvin cycle

18

in the calvin cycle, ___ molecules of CO2 are required to make 1 molecule of glucose

6

19

coordinates regulation of genes essential to nitrogen fixation

nif regulon

20

______ and ______ are the two main regulatory effectors of nitrogen fixation

Oxygen & ammonia

21

what are the Two mechanisms for catabolism of organic compounds

respiration and fermentation

22

Exogenous electron acceptors are present to accept electrons generated from the oxidation of electron donors

respiration

23

Electron donor and acceptor are the same compound

fermentation

24

A process whereby two or more microbes cooperate to degrade a substance neither can degrade alone

syntrophy

25

H2 production by one partner is linked to H2 consumption by the other

interspecies hydrogen transfer

26

what are the most common electron acceptors in anaerobic respiration

inorganic nitrogen compounds

27

the process of nitrate reduction

denitrification

28

what is the state of the product of denitrification?

gas

29

_____ and ______________ are common substrates for chemoorganotrophs

Sugars & polysaccharides

30

Fatty acids are oxidized by _______

beta-oxidation

31

Oxidation of ammonia to nitrate

Nitrification

32

Nitrogen fixation is catalyzed by ______

nitrogenase