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Microbiology - chapter 5

front 1

What is the fate of pyruvic acid in an organism that uses aerobic respiration?

back 1

it is converted into acetyl CoA

front 2

Fatty acids are oxidized in

back 2

The Krebs cycle

front 3

Which of the following is the best definition of oxidative phosphorylation?

back 3

A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP

front 4

Photophosphorylation statements are

back 4

a) light liberates an electron from chlorophyll

b) the oxidation of carrier molecules releases energy

c) energy from oxidation reactions is used to generate ATP from ADP

D) It requires CO2

front 5

A strictly fermentative bacterium produces energy

back 5

by glycolysis only

front 6

In noncyclic photophosphorylation, 02 is released from

back 6

C6H12O6

front 7

Which is the best definition of fermentation

back 7

the partial oxidation of glucose with organic molecules serving as electron acceptors

front 8

In green and purple bacteria, electrons to reduce CO2 can come from

back 8

H2S

front 9

A bacteria are growing on a lipid medium that started at pH 7. The action of lipases case the pH of the medium to

back 9

decrease

front 10

Which of the following uses CO2 for carbon and H2 for energy?

back 10

chemoautotroph

front 11

Which of the following uses glucose for carbon and energy?

back 11

chemoheterotroph

front 12

Which of the following has bacteriochlorophylls and uses alcohols for carbon?

back 12

photoheterotroph

front 13

Cynobacteria are a type of

back 13

photoautotroph

front 14

Which of the following statements are true regarding production of ATP?

back 14

a) ATP is a common intermediate between catabolic and anabolic pathways

b) Anaerobic organisms are capable of generating ATP via respiration

c) ATP can be generated by the flow of protons across protein channels

front 15

Microorganisms that catabolize sugar into ethanol and hydrogen gas would most likely be categorized as

back 15

heterolactic fermenters

front 16

Which of the following statements regarding metabolism is TRUE?

back 16

a) Heat may be release in both anabolic and catabolic reactions

b) ATP is formed in catabolic reactions

c) ADP is formed in anabolic reactions

front 17

Which of the following statements regarding the Entner-Doudoroff pathway is True?

back 17

ATP is generated

front 18

If a cell is starved for ATP, which of the following pathways would most likely be shut down?

back 18

pentose phosphate pathway

front 19

Glycolysis pathway

back 19

a) two pyruvate molecules are generated

b) four ATP molecules are generated via substrate-level phosphorylation

c) two NADH molecules are generated

d) two molecules of water are generated

front 20

A bacterial culture grown in a glucose-peptide medium cases the pH increase. The bacterei are most likely

back 20

using the peptides

front 21

Gallionella bacteria can get energy from the reaction Fe2+ -- Fe3+. This reaction is an example of

back 21

oxidation

front 22

A urease test is used to identify Myobacterium tuberculosis because

back 22

M. tuberculosis produces urease

front 23

Catabolic reactions are generally degradative and hydrolytic?

back 23

True

front 24

The use of enzymes is necessary to increase activation energy requirements of a chemical reaction

back 24

False