Concept explainers
(a)
Interpretation: The name of the enzyme that catalyses the given reaction has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
(b)
Interpretation: The name of the enzyme that catalyses the given reaction has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
(c)
Interpretation: The name of the enzyme that catalyses the given reaction has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
(d)
Interpretation: The name of the enzyme that catalyses the given reaction has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
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General, Organic, and Biological Chemistry
- The first step of the metabolic process known as glycolysis is the conversion of glucose to glucose- 6-phosphate. This process has a positive value for rG' Glucose + Pi Glucose-6-phosphate + H2O rG' = +13.8 kJ/mol-rxn This reaction is coupled to the hydrolysis of ATP ATP + H2O ADP + Pi rG' = -30.5 kJ/mol-rxn What is the sum of these two equations and the value of rG' for the coupled reaction? Is the coupled reaction product-favored at equilibrium?arrow_forwardWhat is the general role of enzymes in the human body?arrow_forwardLactate dehydrogenase catalyzes the following equilibrium reaction in both liver and muscle cells: pyruvate+NADH+H+lactate+NAD+ In terms of equilibrium, explain why lactate must be removed from muscle cells under anaerobic conditions and why lactate does not accumulate in the liver under these conditions. Hint: Think of the Cori cycle.arrow_forward
- Explain why monitoring blood lactate levels might be a useful technique to gauge the amount of conditioning in an Olympic runner.arrow_forwardWhat is the function of the enzyme lactase?arrow_forwardWhich best describes the role of enzymes in a chemical reaction? A. They lower the activation energy in the reaction. B. They prevent the reaction from occurring. C. They are produced by the reaction. D. They are consumed by the reaction.arrow_forward
- 7. The first enzyme of the citric acid cycle, citrate synthetase, is activated by a. NADH b. ATP C. ADP d. more than one choice is correctarrow_forward***In determining glucose concentration using a glucometer, the test involves an enzymatic reaction. What is the enzyme which catalyzes the conversion of glucose to gluconolactone? a. Glucose oxidase b. Glucose reductase c. Glucose synthetase d. Glucose peroxidasearrow_forwardMeat is refrigerated to prevent spoilage by bacteria because the cold A. denatures bacterial enzymes B. inactivates, but does not denature, bacterial enzymes C. decreases the turnover number of bacterial enzymes D. makes meat proteins more resistant to bacterial enzyme activityarrow_forward
- 13. Isoenzyme assays can be used for medical diagnostic purposes because a. damaged tissue produces a different isoenzyme than undamaged tissue b. different tissues produce different isometric forms of the same enzyme C. different isoenzymes react with different substrates d. damaged tissue produces nonfunctioning isoenzymesarrow_forwardWhich of the following enzymes is found in blood serum and is diagnostic of prostate cancer if enzyme levels are elevated? A.alanine aminotransferase B.phosphohexose isomerase C.lactate dehydrogenase D.acid phosphatase E.alkaline phosphatasearrow_forward3. Which of the following statements is FALSE? A. Enzymes speed up the attainment of a reaction equilibrium. B. Enzymes make reactions 10³ to 1020 times faster. C. Enzymes are proteins. D. Enzymes lower the amount of energy needed for a reaction. E. Enzymes are chemically unchanged during the actual catalytic process. 4. The polar head of cerebroside in the membrane can form a. Hydrogen bonds b. lon-dipole interactions c. Both A and B d. Neither A nor B with water molecule.arrow_forward
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