Chapter 10 Microbiology
When you undertake to study microbiology you aim to get an understanding of how a cell works within living things. Through the study of microbiology we have now known how to treat and prevent some of the diseases affecting living things, as we know it. How much do you know about microorganisms? Take up the quiz below and get to find out for sure. All the best and keep an eye out for more quizzes.
- 1.The sum total of all chemical reactions occurring in a cell is called
- A.
Anabolism
- B.
Catabolism
- C.
Metabolism
- D.
None of the choices
- 2.Although most metabolic reactions are freely reversible, a few irreversible catabolic steps are bypassed during biosynthesis with special enzymes that catalyze the reverse reaction in order to allow for independent regulation of catabolic and anabolic pathways.
- A.
True
- B.
False
- 3.Metabolic pathways can be either catabolic or anabolic but not both.
- A.
True
- B.
False
- 4.__________ pathways are those that function both catabolically and anabolically.
- 5.The catabolism of glucose begins with one or more of the glycolytic pathways that yield pyruvate.
- A.
True
- B.
False
- 6.____________ ____________ is a process that can completely catabolize an organic energy source to CO2 using the glycolytic pathways and TCA cycle with O2 as the terminal electron acceptor for an electron transport chain. (2 words)
- 7.Very few gram positive bacteria utilize the Entner-Doudoroff glycolytic pathway.
- A.
True
- B.
False
- 8.Some aerobic bacteria lack the Entner-Doudoroff and Embden-Meyerhoff pathways and instead use the pentose phosphate pathway for glycolysis.
- A.
True
- B.
False
- 9.An organism may use glycolysis and the pentose phosphate pathway simultaneously.
- A.
True
- B.
False
- 10.The net gain of ATP per molecule of glucose metabolized anaerobically via the Embden-Meyerhoff pathway in prokaryotes is
- A.
2
- B.
36
- C.
38
- D.
85
- 11.The net gain of ATP per molecule of glucose metabolized to pyruvate using Entner-Doudoroff pathway is
- A.
4
- B.
2
- C.
1
- D.
0
- 12.The pentose phosphate pathway produces
- A.
CO2
- B.
NADPH
- C.
Glyceraldehyde 3-phosphate
- D.
All of the choices
- 13.The synthesis of ATP from ADP and Pi, when coupled with an exergonic chemical reaction is called __________ phosphorylation.
- A.
Chemiosmotic
- B.
Oxidative
- C.
Substrate level
- D.
Conformational change
- 14.The most common pathway for conversion of glucose to pyruvate is
- A.
Entner-Doudoroff
- B.
Pentose phosphate
- C.
Embden-Meyerhoff
- D.
Mixed acid fermentation
- 15.The TCA cycle generates all of the following from each acetyl-CoA molecule oxidized except
- A.
Three NADH molecules.
- B.
Two CO2 molecules.
- C.
One FADH2 molecule.
- D.
One ATP molecule.
- 16.The pyruvate dehydrogenase complex oxidizes and cleaves pyruvate to form one CO2 and
- A.
Lactate
- B.
Isocitric acid
- C.
Acetyl-CoA
- D.
Succinyl-CoA
- 17.After glycolysis, pyruvate is oxidized to one CO2 and the two-carbon molecule acetyl-CoA by a multienzyme system called the ________ ________ complex. (2 words)
- 18.TCA cycle enzymes are found in the _____________ _________ of eukaryotic cells. (2 words)
- 19.In the TCA cycle, two carbons are removed from citric acid in the form of __________, thereby regenerating oxaloacetate to complete the cycle.
- A.
Acetyl-CoA
- B.
Ethanol
- C.
Carbon dioxide
- D.
Methanol
- 20.In the TCA cycle, two carbons in the form of __________ are added to oxaloacetate at the start of the cycle.
- A.
Acetyl-CoA
- B.
Ethanol
- C.
Carbon dioxide
- D.
Methanol
- 21.The major function(s) of the TCA cycle is(are)
- A.
Energy production
- B.
Provision of carbon skeletons for biosynthesis of cell components.
- C.
Electron transport.
- D.
Energy production and provision of carbon skeletons for biosynthesis of cell components.
- 22.When mitochondria pass electrons donated by NADH through the electron transport chain to molecular oxygen, a theoretical maximum of __________ molecules of ATP can be made per oxygen molecule reduced.
- 23.The hypothesis that proton motive force drives ATP synthesis is called the __________ hypothesis.
- 24.The most commonly accepted hypothesis for the production of ATP that results from electron transport system is called the __________ hypothesis.
- 25.Bacterial electron transport chains may be comprised of fewer components and have lower P/O ratios than mitochondrial transport chains.
- A.
True
- B.
False
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