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Technical Writing for Success3rd EditionDarlene Smith-Worthington, Sue Jefferson 468 solutions The Elements of Life In biology, the elements of life are the essential building blocks that make up living things. They are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. The first four of these are the most important, as they are used to construct the molecules that are necessary to make up living cells. These elements form the basic building blocks of the major macromolecules of life, including carbohydrates, lipids, nucleic acids and proteins. Carbon is an important element for all living organisms, as it is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. Even the cell membranes are made of proteins. Carbon is also used to construct the energy-rich molecules adenosine triphosphate (ATP) and guanosine triphosphate (GTP). Hydrogen is used to construct the molecules water and organic compounds with carbon. Hydrogen is also used to construct ATP and GTP. Nitrogen is used to construct the basic building blocks of life, such as amino acids, nucleic acids, and proteins. It is also used to construct ATP and GTP. Oxygen is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. It is also used to construct ATP and GTP. Phosphorus is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Problem Which of the following statements is true for all exergonic reactions?a) The products have more total energy than the reactants.b) The reaction proceeds with a net loss of free energy.c) The reaction goes only in a forward direction: all reactants will be converted to products.d) A net input of energy from the surroundings is required for the reactions to proceed.The products have more total energy than the reactants. The reaction proceeds with a net loss of free energy. The reaction goes only in a forward direction: all reactants will be converted to products. A net input of energy from the surroundings is required for the reactions to proceed. Next question Related Videos Related Practice Answer the following questions and then press 'Submit' to get your score. Question 1Energy is measured in which of the following units? a) Kelvin b) Joule c) Pascal d) mol Question 2The formation of a chemical bond releases energy. True or false? a) True b) False Question 3Which one of the following statements regarding energy is false? a) The total energy in a chemical universe (a system and its surroundings) is constant b) Energy can be converted from one form to another c) The energy stored in chemical bonds is referred to as kinetic energy d) An object suspended in the air has more energy than an object lying on the ground Question 4In which direction does the transfer of energy as heat happen spontaneously? a) From cold to hot b) From hot to cold Question 5Which one of the following statements best describes the enthalpy change of a reaction? a) The energy released when chemical bonds are formed during a chemical reaction b) The energy consumed when chemical bonds are broken during a chemical reaction c) The difference between the energy released by bond formation and the energy consumed by bond cleavage during a chemical reaction d) The increase in disorder of the system as a reaction proceeds Question 6Enthalpy is represented by which of the following symbols? a) H b) K c) S d) U Question 7Which of the following terms describes a reaction in which there is a net transfer of energy from a system to its surroundings - that is, where more energy is released by bond formation than is consumed by bond cleavage? a) Exothermic b) Endothermic Question 8The enthalpy of combustion of glucose is -2808 kJ mol-1. Which one of the following statements regarding this process is false? a) The products of the combustion of glucose are less stable than glucose itself b) This process is exothermic c) Overall, energy is liberated when this process happens Question 9When a polypeptide chain folds to adopt its characteristic three-dimensional state, its entropy increases. True or false? a) True b) False Question 10Which of the following statements regarding the Gibbs free energy change for a reaction is false? a) The Gibbs free energy change is the proportion of the enthalpy change of a reaction that is used to increase the entropy. b) If the Gibbs free energy change for a reaction is negative, the reaction happens spontaneously. c) The Gibbs free energy is represented by the symbol G d) A reaction with a negative Gibbs free energy change of reaction is called an exergonic reaction. What best describes an exergonic reaction?An exergonic reaction is a reaction that releases free energy. Because this type of reaction releases energy rather than consuming it, it can occur spontaneously, without being forced by outside factors. In chemistry terms, exergonic reactions are reactions where the change in free energy is negative.
Which statement is true about exergonic reactions?The correct answer is (B) The reactions proceed with a net release of free energy. (B) The reactions proceed with a net release of free energy. An exergonic reaction is a reaction that results in the release of energy to the surroundings.
What are the characteristics of an exergonic reaction?Exergonic reactions release energy to the surroundings. The chemical bonds formed from the reaction are stronger than those that were broken in the reactants. The free energy of the system decreases. The change in the standard Gibbs Free Energy (G) of an exergonic reaction is negative (less than 0).
Which of the following best describes an endergonic reaction?An endergonic reaction is a reaction that requires energy to be absorbed in order for it to take place.
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Which of the following statements best describes an exergonic reaction?
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