Microbiology - chapter 5
What is the fate of pyruvic acid in an organism that uses aerobic respiration?
it is converted into acetyl CoA
Fatty acids are oxidized in
The Krebs cycle
Which of the following is the best definition of oxidative phosphorylation?
A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP
Photophosphorylation statements are
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
A strictly fermentative bacterium produces energy
by glycolysis only
In noncyclic photophosphorylation, 02 is released from
Which is the best definition of fermentation
the partial oxidation of glucose with organic molecules serving as electron acceptors
In green and purple bacteria, electrons to reduce CO2 can come from
A bacteria are growing on a lipid medium that started at pH 7. The action of lipases case the pH of the medium to
Which of the following uses CO2 for carbon and H2 for energy?
Which of the following uses glucose for carbon and energy?
Which of the following has bacteriochlorophylls and uses alcohols for carbon?
Cynobacteria are a type of
Which of the following statements are true regarding production of ATP?
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
Microorganisms that catabolize sugar into ethanol and hydrogen gas would most likely be categorized as
Which of the following statements regarding metabolism is TRUE?
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
Which of the following statements regarding the Entner-Doudoroff pathway is True?
ATP is generated
If a cell is starved for ATP, which of the following pathways would most likely be shut down?
pentose phosphate pathway
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
A bacterial culture grown in a glucose-peptide medium cases the pH increase. The bacterei are most likely
using the peptides
Gallionella bacteria can get energy from the reaction Fe2+ -- Fe3+. This reaction is an example of
A urease test is used to identify Myobacterium tuberculosis because
M. tuberculosis produces urease
Catabolic reactions are generally degradative and hydrolytic?
The use of enzymes is necessary to increase activation energy requirements of a chemical reaction