Textbook Question
Which of the following compounds has the greatest amount of energy for a cell?
a. CO2
b. ATP
c. glucose
d. O2
e. lactic acid
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Ch. 5 - Microbial Metabolism
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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Table of contents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 4 - Functional Anatomy of Prokaryotic and Eukaryotic Cells21
- Ch. 5 - Microbial Metabolism20
- Ch. 6 - Microbial Growth20
- Ch. 7 - The Control of Microbial Growth20
- Ch. 8 - Microbial Genetics19
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398Not the one you use?Change textbook
Chapter 5, Problem 5
There are three mechanisms for the phosphorylation of ADP to produce ATP. Write the name of the mechanism that describes each of the reactions in the following table.
Verified step by step guidance1
Step 1: Understand the three main mechanisms of ATP synthesis in microbiology: substrate-level phosphorylation, oxidative phosphorylation, and photophosphorylation.
Step 2: Identify the context of each reaction in the table (e.g., whether it occurs during glycolysis, the electron transport chain, or photosynthesis) to determine which mechanism applies.
Step 3: For reactions where ATP is formed directly by transferring a phosphate group from a phosphorylated intermediate to ADP, classify these as substrate-level phosphorylation.
Step 4: For reactions where ATP is produced using energy derived from the electron transport chain and a proton gradient, classify these as oxidative phosphorylation.
Step 5: For reactions where light energy drives the formation of ATP via a proton gradient in photosynthetic organisms, classify these as photophosphorylation.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Substrate-Level Phosphorylation
This mechanism involves the direct transfer of a phosphate group from a phosphorylated intermediate to ADP, forming ATP. It occurs during glycolysis and the Krebs cycle and does not require oxygen or an electron transport chain.
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03:00
Substrate-Level Phosphorylation
Oxidative Phosphorylation
Oxidative phosphorylation uses energy released by electrons transferred through the electron transport chain to pump protons and create a proton gradient. ATP synthase then uses this gradient to convert ADP to ATP, primarily occurring in the mitochondria.
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06:27Oxidative Phosphorylation
Photophosphorylation
Photophosphorylation occurs in photosynthetic organisms where light energy drives the electron transport chain, creating a proton gradient across the thylakoid membrane. ATP synthase uses this gradient to phosphorylate ADP to ATP during photosynthesis.
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04:36Cyclic Photophosphorylation
Related Practice
Textbook Question
An enzyme and substrate are combined. The rate of reaction begins as shown in the following graph. To complete the graph, show the effect of increasing substrate concentration on a constant enzyme concentration. Show the effect of increasing temperature.
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Textbook Question
All of the energy-producing biochemical reactions that occur in cells, such as photophosphorylation and glycolysis, are ________ reactions.
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Textbook Question
Define oxidation-reduction, and differentiate the following terms:
a. Aerobic and anaerobic respiration
b. Respiration and fermentation
c. Cyclic and noncyclic photophosphorylation
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Textbook Question
Which of the following is the best definition of cellular respiration?
a. A sequence of redox reactions with O2 as the final electron acceptor
b. A sequence of redox reactions with the final electron acceptor from the environment
c. A method of generating ATP
d. The complete oxidation of glucose to CO2 and H2O
e. A series of reactions in which pyruvic acid is oxidized to CO2 and H2O
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Textbook Question
Which of the following is the best definition of the Krebs cycle?
a. The oxidation of pyruvic acid
b. The way cells produce CO2
c. A series of chemical reactions in which NADH is produced from the oxidation of pyruvic acid
d. A method of producing ATP by phosphorylating ADP
e. A series of chemical reactions in which ATP is produced from the oxidation of pyruvic acid
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