Textbook Question
Reactions involved in the light-independent reactions of photosynthesis constitute the _______.
a. Citric acid cycle
b. Entner-Doudoroff pathway
c. Calvin-Benson cycle
d. pentose phosphate pathway
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Ch. 5 - Microbial Metabolism
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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Table of contents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook
Chapter 5, Problem 17
Which of the following statements about the Entner-Doudoroff pathway is false?
a. It is a series of reactions that synthesizes glucose.
b. Its products are sometimes used to determine the presence of Pseudomonas.
c. It is a pathway of chemical reactions that catabolizes glucose.
d. It is an alternative pathway to glycolysis.
Verified step by step guidance1
Step 1: Understand the Entner-Doudoroff (ED) pathway. It is a metabolic pathway used by some bacteria to break down glucose, so it is involved in catabolism, not synthesis.
Step 2: Analyze option (a): 'It is a series of reactions that synthesizes glucose.' Since the ED pathway breaks down glucose rather than synthesizing it, this statement is likely false.
Step 3: Consider option (b): The ED pathway products can be used as biochemical markers to identify certain bacteria like Pseudomonas, so this statement is true.
Step 4: Review option (c): The pathway catabolizes glucose, meaning it breaks glucose down to extract energy, so this statement is true.
Step 5: Evaluate option (d): The ED pathway is an alternative to glycolysis (Embden-Meyerhof-Parnas pathway) for glucose catabolism, so this statement is true.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Entner-Doudoroff Pathway
The Entner-Doudoroff pathway is a metabolic route used by some bacteria to break down glucose into pyruvate and glyceraldehyde-3-phosphate. It serves as an alternative to the more common glycolysis pathway and is involved in glucose catabolism, not synthesis.
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Entner-Doudoroff Pathway
Glucose Catabolism vs. Glucose Synthesis
Glucose catabolism refers to the breakdown of glucose molecules to release energy, while glucose synthesis involves creating glucose from smaller molecules. The Entner-Doudoroff pathway is involved in catabolism, meaning it degrades glucose rather than synthesizing it.
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Microbial Identification Using Metabolic Pathways
Certain metabolic pathways and their products can be used as biochemical markers to identify specific bacteria. For example, the presence of the Entner-Doudoroff pathway and its products can help detect bacteria like Pseudomonas, which utilize this pathway uniquely compared to other microbes.
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Related Practice
Textbook Question
The glycolysis pathway is basically _______.
a. catabolic
b. amphibolic
c. anabolic
d. cyclical
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Textbook Question
Under ideal conditions, the fermentation of one glucose molecule by a bacterium allows a net gain of how many ATP molecules?
a. 2
b. 4
c. 38
d. 0
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Textbook Question
Under ideal conditions, the complete aerobic oxidation of one molecule of glucose by a bacterium allows a net gain of how many ATP molecules?
a. 2
b. 4
c. 38
d. 0
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Textbook Question
A laboratory scientist notices that a certain bacterium does not utilize lactose when glucose is available in its environment. Describe a cellular regulatory mechanism that would explain this observation.
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Textbook Question
A major difference between anaerobic respiration and anaerobic fermentation is _______.
a. in the use of oxygen
b. that the former requires breathing
c. that the latter uses organic molecules within the cell as final electron acceptors
d. that fermentation only produces alcohol
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