Nclex-Rn Practice Questions-Microbiology Microbial Metabolism

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Start

Congratulations - you have completed Nclex-Rn Practice Questions-Microbiology Microbial Metabolism.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

Which of the following compounds is NOT an enzyme?

A	dehydrogenase
B	cellulase
C	coenzyme A
D	β-galactosidase
E	sucrase

Question 2

A bacterial culture grown in a glucose-peptide medium causes the pH to increase. The bacteria are most likely

A	fermenting the glucose.
B	oxidizing the glucose.
C	using the peptides.
D	not growing.

Question 3

Which of the following statements regarding the glycolysis pathway is FALSE?

A	Two pyruvate molecules are generated.
B	Four ATP molecules are generated via substrate-level phosphorylation.
C	Two NADH molecules are generated.
D	One molecule of ATP is expended.
E	Two molecules of water are generated.

Question 4

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

A	Kreb's cycle
B	glycolysis
C	pentose phosphate pathway
D	Krebs cycle and glycolysis

Question 5

An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT

A	allosteric inhibition.
B	competitive inhibition.
C	feedback inhibition.
D	noncompetitive inhibition.

Question 6

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

A	It involves glycolysis.
B	It involves the pentose phosphate pathway.
C	NADH is generated.
D	ATP is generated.
E	NADH and ATP are generated.

Question 7

Which of the following statements regarding metabolism is FALSE?

A	Heat may be released in both anabolic and catabolic reactions.
B	ATP is formed in catabolic reactions.
C	ADP is formed in anabolic reactions.
D	Anabolic reactions are degradative.

Question 8

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

A	aerobic respirers.
B	anaerobic respirers.
C	heterolactic fermenters.
D	homolactic fermenters.
E	alcohol fermenters.

Question 9

Cyanobacteria are a type of

A	chemoautotroph.
B	chemoheterotroph.
C	photoautotroph.
D	photoheterotroph.

Question 10

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

A	chemoautotroph
B	chemoheterotroph
C	photoautotroph
D	photoheterotroph

Question 11

Which of the following uses glucose for carbon and energy?

A	chemoautotroph
B	chemoheterotroph
C	photoautotroph
D	photoheterotroph

Question 12

A urease test is used to identify Mycobacterium tuberculosis because

A	urease is a sign of tuberculosis.
B	M. tuberculosis produces urease.
C	urea accumulates during tuberculosis.
D	some bacteria reduce nitrate ion.
E	M. bovis can cause tuberculosis.

Question 13

Which one of the following would you predict is an allosteric inhibitor of the Krebs cycle enzyme, α-ketoglutarate dehydrogenase?

A	citric acid
B	α-ketoglutaric acid
C	NAD+
D	NADH
E	ADP

Question 14

Researchers are developing a ribozyme that cleaves the HIV genome. This pharmaceutical agent could be described as

A	an RNA molecule capable of catalysis.
B	a hydrolase.
C	a genetic transposable element.
D	a protease inhibitor.
E	a competitive inhibitor for reverse transcriptase.

Question 15

Which of the following statements about substrate-level phosphorylation is FALSE?

A	It involves the direct transfer of a high-energy phosphate group from an intermediate metabolic compound to ADP.
B	No final electron acceptor is required.
C	It occurs in glycolysis.
D	The oxidation of intermediate metabolic compounds releases energy that is used to generate ATP.
E	It occurs to a lesser degree in the Krebs cycle than in glycolysis.

Question 16

Which of the following statements about anaerobic respiration is FALSE?

A	It yields lower amounts of ATP when compared to aerobic respiration.
B	The complete Kreb's cycle is utilized.
C	It involves the reduction of an organic final electron acceptor.
D	It generates ATP.
E	It requires cytochromes.

Question 17

Which biochemical process is NOT used during glycolysis?

A	substrate-level phosphorylation
B	oxidation-reduction
C	carbohydrate catabolism
D	beta oxidation
E	enzymatic reactions

Question 18

The advantage of the pentose phosphate pathway is that it produces all of the following EXCEPT

A	precursors for nucleic acids.
B	precursors for the synthesis of glucose.
C	three ATPs.
D	NADPH.
E	precursors for the synthesis of amino acids.

Question 19

A strictly fermentative bacterium produces energy

A	by glycolysis only.
B	by aerobic respiration only.
C	by fermentation or aerobic respiration.
D	only in the absence of oxygen.
E	only in the presence of oxygen.

Question 20

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

A	It is reduced to lactic acid.
B	It reacts with oxaloacetate to form citrate.
C	It is oxidized in the electron transport chain.
D	It is catabolized in glycolysis.
E	It is converted into acetyl CoA.

Question 21

Which of the following is NOT necessary for respiration?

A	cytochromes
B	flavoproteins
C	a source of electrons
D	oxygen
E	quinones

Question 22

Fatty acids are oxidized in

A	the Krebs cycle.
B	the electron transport chain.
C	glycolysis.
D	the pentose phosphate pathway.
E	the Entner-Doudoroff pathway.

Question 23

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

A	oxidation.
B	reduction.
C	fermentation.
D	photophosphorylation.
E	the Calvin-Benson cycle.

Question 24

Which organism is NOT correctly matched to its energy source?

A	photoheterotroph - light
B	photoautotroph - CO2
C	chemoautotroph - Fe2+
D	chemoheterotroph - glucose
E	chemoautotroph-NH3

Question 25

Which of the following is the best definition of fermentation?

A	the partial reduction of glucose to pyruvic acid
B	the partial oxidation of glucose with organic molecules serving as electron acceptors
C	the complete catabolism of glucose to CO2 and H2O
D	the production of energy by oxidative-level phosphorylation
E	the production of energy by both substrate and oxidative phosphorylation

Question 26

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

A	Electrons are passed through a series of carriers to O2.
B	A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP.
C	ATP is directly transferred from a substrate to ADP.
D	Electrons are passed through a series of carriers to an organic compound.

Question 27

Which of the following statements about photophosphorylation is FALSE?

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.
E	It occurs in photosynthesizing cells.

Question 28

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

A	chemoautotroph
B	chemoheterotroph
C	photoautotroph
D	photoheterotroph

Question 29

In noncyclic photophosphorylation, O2 is released from

A	CO2.
B	H2O.
C	C6H12O6.
D	sunlight.
E	chlorophyll.

Question 30

Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts are growing well on the maltose medium but are not producing alcohol. What is the most likely explanation?

A	The maltose is toxic.
B	O2 is in the medium.
C	Not enough protein is provided.
D	The temperature is too low.
E	The temperature is too high.

Question 31

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

A	CO2.
B	H2O.
C	C6H12O6.
D	H2S.
E	chlorophyll.

Question 32

Assume you are growing bacteria on a lipid medium that started at pH 7. The action of bacterial lipases should cause the pH of the medium to

A	increase.
B	decrease.
C	stay the same.

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 32 questions to complete.

related categories

Nclex Practice Questions Nclex-Nursing Resources

Nclex-Rn Practice Questions-Microbiology Microbial Metabolism

Nclex-Rn Practice Questions-Microbiology Microbial Metabolism

related categories

Related posts

Leave a Reply Cancel reply