Question 1

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

Accepted Answer

A) Krebs cycle 
B) glycolysis 
C) pentose phosphate pathway 
D) Krebs cycle and glycolysis 
A) Krebs cycle 
B) glycolysis 
C) pentose phosphate pathway 
D) Krebs cycle and glycolysis

Question 2

Catabolic reactions are generally degradative and hydrolytic.

Accepted Answer

A) True 
 B)False

Question 3

Figure 5.8
  
-In Figure 5.8,the path labeled "2" is the flow of

Accepted Answer

A) electrons. 
B) protons. 
C) energy. 
D) water. 
E) glucose. 
A) electrons. 
B) protons. 
C) energy. 
D) water. 
E) glucose.

Question 4

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

Accepted Answer

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

Question 5

In general,ATP is generated in catabolic pathways and expended in anabolic pathways.

Accepted Answer

A) True 
 B)False

Question 6

Compare and contrast photophosphorylation and oxidative phosphorylation.

Accepted Answer

Photophosphorylation and oxidative phosp

Question 7

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

Accepted Answer

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

Question 8

Which of the following statements regarding metabolism is FALSE?

Accepted Answer

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. 
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 9

Which statements correspond to amphibolic pathways? 1.Anabolic and catabolic reactions are joined through common intermediate.
2)They are shared metabolic pathways.
3)Feedback inhibition can help regulate rates of reactions.
4)Both types of reactions are necessary but do not occur simultaneously.

Accepted Answer

A) 1 only 
B) 1,2,3 
C) 1,2,3,4 
D) 2,4 
E) 2,3,4 
A) 1 only 
B) 1,2,3 
C) 1,2,3,4 
D) 2,4 
E) 2,3,4

Question 10

A bacterium that only possesses the ability to ferment obtains energy

Accepted Answer

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. 
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 11

Figure 5.2  
-What type of reaction is in Figure 5.2?

Accepted Answer

A) decarboxylation 
B) transamination 
C) dehydrogenation 
D) oxidation 
E) reduction 
A) decarboxylation 
B) transamination 
C) dehydrogenation 
D) oxidation 
E) reduction

Question 12

Figure 5.8
  
-What is the most acidic place in Figure 5.8?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 13

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

Accepted Answer

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. 
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 14

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

Accepted Answer

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. 
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 regarding the glycolysis pathway is FALSE?

Accepted Answer

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. 
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 16

Figure 5.5  
-Which of the graphs in Figure 5.5 best illustrates the activity of an enzyme that is saturated with substrate?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 17

Figure 5.8
  
-Refer to Figure 5.8.In aerobic respiration,where is water formed?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 18

Which of the following statements are TRUE?
1-Electron carriers are located at ribosomes.
2-ATP is a common intermediate between catabolic and anabolic pathways.
3-ATP is used for the long-term storage of energy and so is often found in storage granules.
4-Anaerobic organisms are capable of generating ATP via respiration.
5-ATP can be generated by the flow of protons across protein channels.

Accepted Answer

A) 2,4,5 
B) 1,3,4 
C) 2,3,5 
D) 1,2,3 
E) All of the statements are true. 
A) 2,4,5 
B) 1,3,4 
C) 2,3,5 
D) 1,2,3 
E) All of the statements are true.

Question 19

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

Accepted Answer

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. 
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 20

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

Accepted Answer

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

Exam 5: Microbial Metabolism

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

Catabolic reactions are generally degradative and hydrolytic.

Figure 5.8 -In Figure 5.8,the path labeled "2" is the flow of

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

In general,ATP is generated in catabolic pathways and expended in anabolic pathways.

Compare and contrast photophosphorylation and oxidative phosphorylation.

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

Which of the following statements regarding metabolism is FALSE?

Which statements correspond to amphibolic pathways? 1.Anabolic and catabolic reactions are joined through common intermediate. 2)They are shared metabolic pathways. 3)Feedback inhibition can help regulate rates of reactions. 4)Both types of reactions are necessary but do not occur simultaneously.

A bacterium that only possesses the ability to ferment obtains energy

Figure 5.2 -What type of reaction is in Figure 5.2?

Figure 5.8 -What is the most acidic place in Figure 5.8?

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

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

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

Figure 5.5 -Which of the graphs in Figure 5.5 best illustrates the activity of an enzyme that is saturated with substrate?

Figure 5.8 -Refer to Figure 5.8.In aerobic respiration,where is water formed?

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

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

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, algae, protozoa, and Helminths

Viruses,viroids,and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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