Almost every chemical reaction in a living cell requires an enzyme to speed the reaction fast...
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Almost every chemical reaction in a living cell requires an enzyme to speed the reaction fast enough for life to continue. This is true for the many reactions involved in cellular respiration. Some of these reactions are reversible, some are not. How many enzymes are needed for a reversible reaction?
one
two
three
four
Homework Answers
Since the enzymatic reactions are reversible the same enzyme can synthesize and degrade the molecule depending on the concentration of the reactant and product. There is no need for an extra enzyme for reversible reaction only one enzyme can do so. In irreversible reaction we need another enzyme
One is correct answer.
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Almost every chemical reaction in a living cell requires an
enzyme to speed the reaction fast...
Part 1: Warm Up (12 minutes) Almost every chemical reaction that occurs in a living thing...
Part 1: Warm Up (12 minutes) Almost every chemical reaction that occurs in a living thing is catalyzed by an enzyme. The purpose of this exercise is for you to: 1) get a better understanding of the principles of catalysis; 2) gain experience and practice drawing and interpreting reaction coordinate diagrams, and 3) developing a better understanding of how enzymes behave as catalysts. Try to answer questions 1-4 without consulting notes, books, etc. Use each other's knowledge 1. With respect...
1. What are the different sources of energy available to living organisms? 2. How do the...
1. What are the different sources of energy available to living organisms? 2. How do the acquisition and the use of energy by living organisms work according to the laws of thermodynamics? 3. Explain the energy use in the following reactions: endergonic/exergonic. 4. What is metabolism? How are chemical reactions related to metabolism? Why is energy needed to run a metabolism? What are coupled reactions? 5. Draw a picture of ATP. Why is this molecule so important for cells? How...
What is the critical difference between passive and active transport? A. passive requires energy but active...
What is the critical difference between passive and active transport? A. passive requires energy but active does not B. passive requires no energy, but active does C. passive and active each require energy, but passive requires less What is an enzyme? A. a protein that facilitates a reaction B. a protein that supplies water for hydrolysis reactions C. a protein that absorbs water during dehydration reactions The First Law of Thermodynamics states: A. energy can be changed from one form...
D Each enzyme is specihic of and because its shape catalyzes on certain reactions. The chemical reactions taking place in a cell will most likely speed up if the 3. A genetic material stops re...
D Each enzyme is specihic of and because its shape catalyzes on certain reactions. The chemical reactions taking place in a cell will most likely speed up if the 3. A genetic material stops replicating. B the size of the cell increases. C the enzymes involved become inactive. D the concentration of the reactants is increased. 4. Enzymes A are able to heat up molecules so that they can react B provide CO2 for chemical reactions. C are biological catalysts....
help lower the activation energy needed for a chemical reaction and also regulate the speed of...
help lower the activation energy needed for a chemical reaction and also regulate the speed of reactions within a cell. Two primary contributors to the amount of their activity are and Select one: a. Enzymes, pH, temperature b. Substrates, temperature, pH c. Organelles, pH, mitochondria 10 d. Mitochondria, temperature, substrates
no explaination is needed 28) Which of the following is true for all exergonic reactions? A)...
no explaination is needed
28) Which of the following is true for all exergonic reactions? A) The reaction proceeds with a net release of free energy B) The products have more total energy than the reactants. C) A net input of energy from the surroundings is required for the reactions to proceed. D) The reactions are nonspontaneous 29) When ATP releases some energy, it also releases Inorganic phosphate. What purpose does this serve (if any) in the cell? A) It...
Tele No The first law of thermodynamics states that energy cannot be created or destroyed. If...
Tele No The first law of thermodynamics states that energy cannot be created or destroyed. If this is the case, why is it said that "energy does not cycle"? 1. 2. In the body, glucose can be broken down via cellular respiration to provide energy, or it can be built into chains of glycogen (or starch for plants) and stored. What determines which reaction glucose undergoes? 3. In the following metabolic pathway, we normally get the final product "G." A-F...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
Photosynthesis and Cell respiration Worksheet Photosynthesis: lWrite the general reaction for photosynthesis. Are the chemical reactants...
Photosynthesis and Cell respiration Worksheet Photosynthesis: lWrite the general reaction for photosynthesis. Are the chemical reactants and products balanced? 2) Prepare a rough drawing of a chloroplast labeling the following: chloroplast, grans, thylakoid membrane, stroma 3) What links photosystem I and photosystem 11? What is the purpose of this link? 4) Consider what happens when light is absorbed by the pigments of photosystem ll; How are electrons affected by the light absorption? Where do the excited electrons go? 5) In...
29. Based on the endosymbiont theory which was once a free living prokaryote? A. Chloroplast B....
29. Based on the endosymbiont theory which was once a free living prokaryote? A. Chloroplast B. Golgi C. Lysosome D. rough endoplasmic reticulum E. B and D 30. Exporting large substances out of the cell can be accomplished by A. exocytosis B. facilitated diffusion C. endocytosis D. osmosis 31. Lipase is an enzyme which breaks down A. Sugar B. Proteins C. DNA D. Fats 32. Which is not true of the plasma membrane? A. Composed of triglycerides B. Has proteins...
Part 1: Warm Up (12 minutes) Almost every chemical reaction that occurs in a living thing is catalyzed by an enzyme. The purpose of this exercise is for you to: 1) get a better understanding of the principles of catalysis; 2) gain experience and practice drawing and interpreting reaction coordinate diagrams, and 3) developing a better understanding of how enzymes behave as catalysts. Try to answer questions 1-4 without consulting notes, books, etc. Use each other's knowledge 1. With respect...
1. What are the different sources of energy available to living organisms? 2. How do the acquisition and the use of energy by living organisms work according to the laws of thermodynamics? 3. Explain the energy use in the following reactions: endergonic/exergonic. 4. What is metabolism? How are chemical reactions related to metabolism? Why is energy needed to run a metabolism? What are coupled reactions? 5. Draw a picture of ATP. Why is this molecule so important for cells? How...
D Each enzyme is specihic of and because its shape catalyzes on certain reactions. The chemical reactions taking place in a cell will most likely speed up if the 3. A genetic material stops replicating. B the size of the cell increases. C the enzymes involved become inactive. D the concentration of the reactants is increased. 4. Enzymes A are able to heat up molecules so that they can react B provide CO2 for chemical reactions. C are biological catalysts....
help lower the activation energy needed for a chemical reaction and also regulate the speed of reactions within a cell. Two primary contributors to the amount of their activity are and Select one: a. Enzymes, pH, temperature b. Substrates, temperature, pH c. Organelles, pH, mitochondria 10 d. Mitochondria, temperature, substrates
no explaination is needed
28) Which of the following is true for all exergonic reactions? A) The reaction proceeds with a net release of free energy B) The products have more total energy than the reactants. C) A net input of energy from the surroundings is required for the reactions to proceed. D) The reactions are nonspontaneous 29) When ATP releases some energy, it also releases Inorganic phosphate. What purpose does this serve (if any) in the cell? A) It...
Tele No The first law of thermodynamics states that energy cannot be created or destroyed. If this is the case, why is it said that "energy does not cycle"? 1. 2. In the body, glucose can be broken down via cellular respiration to provide energy, or it can be built into chains of glycogen (or starch for plants) and stored. What determines which reaction glucose undergoes? 3. In the following metabolic pathway, we normally get the final product "G." A-F...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
Photosynthesis and Cell respiration Worksheet Photosynthesis: lWrite the general reaction for photosynthesis. Are the chemical reactants and products balanced? 2) Prepare a rough drawing of a chloroplast labeling the following: chloroplast, grans, thylakoid membrane, stroma 3) What links photosystem I and photosystem 11? What is the purpose of this link? 4) Consider what happens when light is absorbed by the pigments of photosystem ll; How are electrons affected by the light absorption? Where do the excited electrons go? 5) In...
29. Based on the endosymbiont theory which was once a free living prokaryote? A. Chloroplast B. Golgi C. Lysosome D. rough endoplasmic reticulum E. B and D 30. Exporting large substances out of the cell can be accomplished by A. exocytosis B. facilitated diffusion C. endocytosis D. osmosis 31. Lipase is an enzyme which breaks down A. Sugar B. Proteins C. DNA D. Fats 32. Which is not true of the plasma membrane? A. Composed of triglycerides B. Has proteins...
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