31. Which of the following is true? A.In a catabolic reaction, molecules assemble into smaller ones and release energy B. In a catabolic reaction, molecules assemble into smaller ones and store energy C. In a catabolic reaction, molecules break down into smaller ones and release energy D. In a catabolic reaction, molecules break down into smaller ones and store energy

31. Which of the following is true? A.In a catabolic reaction, molecules assemble into smaller ones and release energy B. In a catabolic reaction, molecules assemble into smaller ones and store energy C. In a catabolic reaction, molecules break down into smaller ones and release energy D. In a catabolic reaction, molecules break down into smaller ones and store energy

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter6: Metabolism

Section: Chapter Questions

Problem 7RQ: Which of the following comparisons or contrasts between endergonic and exergonic reactions is false?...

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32. Which of the following is true? A. An exergonic reaction, energy is released and the delta G is positive B. An exergonic reaction, energy is stored and the delta G is negative C. An exergonic reaction, energy is released and the delta G is negative D. An exergonic reaction, energy is stored and the delta G is positive
adenine molecule ii. NH2 N- НО-Р—О—Р—О—Р—О. ОН ОН ОН i. Phosphate chain ОН ОН iii ribose sugar
2. Draw a graph showing a downhill (spontaneous) reaction, that requires some activation energy to get it going. Then draw and clearly label on the graph b. The activation energy for the reaction (use a bracket to indicate the upper and lower limits) c. The free energy change for the reactions (use a bracket to indicate the upper and lower limits) d. How an enzyme will change the energetics of the reaction. I suggest you use a dotted line for the enzyme.
7. Use this figure to summarize how ATP is used as energy "currency", harnessing some of the energy released from metabolism so it can be used when needed. a. Draw the correct type of curve on each graph (including activation energy). Free Energy energy thermic Example: -() Progress of the Reaction Progress of the Reaction b. In order to contrast the processes use the following prefixes or words: ana-, breaking down proteins, cata-, dehydration synthesis, ender-, endo-, exer-, exo-, hydrolysis, making proteins, releasing, requiring _gonic) ATP bolic metabolism reaction type ADP + P Free Energy energy Example: thermic _gonic) bolic metabolism reaction type 4
7. Which of the following statements is true about enzyme-catalyzed reactions? The reaction is faster than the same reaction in the absence of the enzyme b. The free energy change of the reaction is opposite from the reaction without the enzyme The reaction always goes in the direction toward chemical equilibrium d. Enzyme-catalyzed reactions require energy to activate the enzyme e. Enzyme-catalyzed reactions release more free energy than noncatalyzed reactions The following questions are based on the reaction A+B C+D Free Energy- A+B Progress of the Reaction C.D
1. Below is a plot that shows the relative activity of a particular enzyme at various Answer the following questions about this graph. temperatures. Enzyme activity → 10 15 20 25 30 35 40 45 50 Temperature (°C). A. Why does the enzyme's activity increase between 10°C and 37°C? ( B. Why does the enzyme's activity decrease sharply after the temperature is raised above 37°C?(
3. a. In the process of converting ADP to ATP, water is circle one: (REQUIRED / RELEASED) and therefore this is called a reaction type. Does this type of reaction require an enzyme? circle one: ( NO / YES / sometimes ) This reaction circle one: (REQUIRES / RELEASES) energy! b. In the process of converting ATP to ADP, water is circle one: (REQUIRED / RELEASED) and therefore this is called a reaction type. Does this type of reaction require an enzyme? circle one: ( NO / YES / sometimes ) This reaction circle one: (REQUIRES / RELEASES) energy! c. Explain why ATP is like a rechargeable battery.
I. True or Flase a. An inhibitor may compete with the substrate for binding to the active site of an enzyme. b. Enzymes increase the rate of a chemical reaction by providing an alternative path with a lower activation energy. c. Enzymes are unconsumed during a reaction and can alter the position of chemical equilibrium.
26. AN ORGANIC COFACTOR IN A CONJUGATED ENZYME?A. NEITHER VITAMINS NOR MINERALSB. MINERALS C. VITAMINSD. BOTH VITAMINS AND MINERALS 27. WHICH OF THE FOLLOWING STATEMENTS CONCERNING COFACTORS IS INCORRECT?A. VITAMINS CANNOT BE COFACTORSB. SOME COFACTORS ARE METAL IONS C. COFACTOR IS THE NON-PROTEIN PORTION OF ENZYME D. CONJUGATED ENZYMES CONTAIN COFACTORS 28. WHICH OF THE FOLLOWING VITAMINS IS NOT A FAT SOLUBLE VITAMIN? A. VITAMIN E B. VITAMIN C C. VITAMIN A D. VITAMIN D 29. WHAT HAPPENS TO SUBSTRATE MOLECULES AT AN ENZYME ACTIVE SITE?A. ALWAYS REACT WITH OXYGEN B. UNDERGO CHANGE TO A DESIRED PRODUCTS C. BECOME CATALYST C ALWAYS REACT WITH OXYGEN B UNDERGO CHANGE TO A DESIRED PRODUCT D. BECOME COVALENTLY BONDED TO THE ENZYME D. BECOME COVALENTLY BONDED TO THE ENZYME 30. ACTION OF CHEMICAL WARFARE AND ORGANOPHOSPHATE INSECTICIDE ARE BASED ON?A. REVERSIBLE ENZYME INHIBITOR B. IRREVERSIBLE ENZYME INHIBITOR C. REVERSIBLE ENZYME ACTIVATOR D. IRREVERSIBLE ENZYME ACTIVATOR
6. Use the graph below to answer the questions in 6a and 6b. Free Energy A+B a. Progress of the Reaction C. d. e. C+D a. The forward reaction in figure above is described as circle one: (Endothermic/ Exothermic) and is part of circle one: (Anabolic (building) / Catabolic (breaking down) metabolism. The change in free energy is circle one: (-AG / +AG) The forward reaction would be written as: + Please select the correct letters from graph (a-e) to match the description for the forward reaction Activation energy without an enzyme. Activation energy with an enzyme. AG (change in free energy). The role of the enzyme is to circle one: (regulate / speed up /inhibit) a reaction by circle one: (INCREASING / DECREASING) the Does the forward reaction require an input of cellular energy? circle one: (YES / NO) Does the forward reaction release energy? circle one: (YES / NO) Is the activation energy provided by ATP circle one: (YES / NO). It is provided by physical strain on the bond due to how…
9. For the graph below, which arrow indicates the ACTIVATION ENERGY for an ENZYME CATYLIZED reaction? reactants e.g. CO, + H,O products H,CO, Reaction coordinate O A B. C. Energy
3. Consider the reaction: H3C-(CH₂) H H C—C—C—SCOA HH H₂C-(CH₂) a. What kind of reaction is being performed here? b. What enzyme performs this reaction? -C—C—C—SCOA H H c. What cofactors, if any, are required for this reaction?