Question 1

The pentose phosphate pathway can be characterized as an anabolic pathway.

Accepted Answer

A) True 
 B)False

Question 2

Carbon fixation occurs during the light- independent phase of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is NOT necessary for respiration?

Accepted Answer

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

Question 4

Which organism is NOT correctly matched to its energy source?

Accepted Answer

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

Question 5

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

Question 6

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

Accepted Answer

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

Question 7

Glycolysis is utilized by cells in both respiration and fermentation.

Accepted Answer

A) True 
 B)False

Question 8

Figure 5.7
  
-The graph at the left in Figure 5.7 shows the reaction rate for an enzyme at its optimum temperature. Which graph shows enzyme activity at a higher temperature?

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

A strictly fermentative bacterium produces energy

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

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

Question 17

A urease test is used to identify Myobacterium tuberculosis because

Accepted Answer

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

Question 18

Which of the following statements regarding metabolism is FALSE?

Accepted Answer

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

Question 19

In noncyclic photophosphorylation, O2 is released from

Accepted Answer

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

Question 20

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

Exam 5: Microbial Metabolism

The pentose phosphate pathway can be characterized as an anabolic pathway.

Carbon fixation occurs during the light- independent phase of photosynthesis.

Which of the following is NOT necessary for respiration?

Which organism is NOT correctly matched to its energy source?

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

Glycolysis is utilized by cells in both respiration and fermentation.

Figure 5.7 -The graph at the left in Figure 5.7 shows the reaction rate for an enzyme at its optimum temperature. Which graph shows enzyme activity at a higher temperature?

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

A strictly fermentative bacterium produces energy

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

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

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

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

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

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

A urease test is used to identify Myobacterium tuberculosis because

Which of the following statements regarding metabolism is FALSE?

In noncyclic photophosphorylation, O2 is released from

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

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Recombinant Dna

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

Filters

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

Which of the following uses CO₂for carbon and H₂for energy?

In noncyclic photophosphorylation, O₂is released from