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Questions and Answers
Which process requires external energy input for it to happen?
Which process requires external energy input for it to happen?
What is the literal meaning of 'Catabolism'?
What is the literal meaning of 'Catabolism'?
What is the main purpose of catabolism in a cell?
What is the main purpose of catabolism in a cell?
What is the sum of anabolism and catabolism?
What is the sum of anabolism and catabolism?
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Which process makes energy available for cellular work?
Which process makes energy available for cellular work?
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What is the role of anabolism in producing proteins from amino acids?
What is the role of anabolism in producing proteins from amino acids?
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Which process involves linking monomers to produce polymers?
Which process involves linking monomers to produce polymers?
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What is the primary reason for a cell to engage in catabolism?
What is the primary reason for a cell to engage in catabolism?
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Which process can happen on its own, without the input of external energy?
Which process can happen on its own, without the input of external energy?
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What does non-spontaneous work require?
What does non-spontaneous work require?
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What is the role of ATP hydrolysis in cellular reactions?
What is the role of ATP hydrolysis in cellular reactions?
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What is the function of activation energy (EA) in a reaction?
What is the function of activation energy (EA) in a reaction?
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How do enzymes speed up reactions?
How do enzymes speed up reactions?
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What is the role of catalysts in spontaneous reactions?
What is the role of catalysts in spontaneous reactions?
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Why are most biochemical reactions in cells catalyzed by enzymes?
Why are most biochemical reactions in cells catalyzed by enzymes?
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What is the main function of regulatory enzymes in a metabolic pathway?
What is the main function of regulatory enzymes in a metabolic pathway?
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What is the role of feedback inhibition in controlling metabolic pathways?
What is the role of feedback inhibition in controlling metabolic pathways?
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How do cells control metabolism through enzymes?
How do cells control metabolism through enzymes?
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What is the significance of enzymes showing specificity in catalyzing biochemical reactions?
What is the significance of enzymes showing specificity in catalyzing biochemical reactions?
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Why are there no general enzymes, showing specificity in catalyzing reactions?
Why are there no general enzymes, showing specificity in catalyzing reactions?
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Which of the following is true about biochemical pathways?
Which of the following is true about biochemical pathways?
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What is the role of ATP in cellular work?
What is the role of ATP in cellular work?
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What is the Gibbs free energy (G) of a system?
What is the Gibbs free energy (G) of a system?
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What does the second law of thermodynamics imply about energy conversion?
What does the second law of thermodynamics imply about energy conversion?
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What is the function of enzymes in biochemical pathways?
What is the function of enzymes in biochemical pathways?
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What is the role of energy coupling in cells?
What is the role of energy coupling in cells?
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What is the significance of ATP hydrolysis in cells?
What is the significance of ATP hydrolysis in cells?
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What happens in a spontaneous reaction?
What happens in a spontaneous reaction?
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What is the relationship between energy transformation and entropy?
What is the relationship between energy transformation and entropy?
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How are cellular energy processes analogized at the cellular level?
How are cellular energy processes analogized at the cellular level?
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Study Notes
Biochemical Pathways and Energy Coupling
- Energy coupling links catabolic processes that release energy to anabolism and other energy-requiring work.
- Biochemical pathways are series of linked reactions where the products of one reaction become the substrates for the next.
- Important biochemical pathways include glycolysis, citric acid cycle, and the Calvin cycle.
- Each reaction in a pathway is catalyzed by a unique enzyme, which are proteins that catalyze biochemical reactions.
- At the cellular level, energy coupling can be analogized to water at the top of a dam, electricity, and making toast.
- The laws of thermodynamics state that energy is conserved and every energy transformation increases the entropy of the universe.
- The second law of thermodynamics implies that all energy is eventually converted into heat, which cannot be used by cells to perform work.
- Gibbs free energy (G) is the portion of a system’s energy that can be used to perform work when the temperature is uniform throughout the system.
- The free energy change (ΔG) is the difference in G between the final and initial state of a system.
- Adenosine triphosphate (ATP) is the energy currency of a cell and is consumed during various types of cellular work.
- ATP hydrolysis is a common coupling reaction used to drive forward nonspontaneous reactions in cells.
- A spontaneous reaction occurs when the products have greater stability than the substrates, indicated by a negative ΔG.
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Description
Test your knowledge of biochemical pathways and energy coupling with this quiz. Explore important pathways such as glycolysis and the citric acid cycle, and learn about the role of ATP as the cell's energy currency. Delve into the laws of thermodynamics and understand how energy is harnessed and transferred within the cell.