I need help in my bio quiz that is due in an hour. Please help asap, thank you!
ID: 96586 • Letter: I
Question
I need help in my bio quiz that is due in an hour. Please help asap, thank you!16. The sum total of all the chemical reactions in a living structure is called its (2 points) a. energetics. b. activity c. digestive power. d. entropy e. metabolism. 17. In any closed system, the total energy includes usable and unusable energy. It is called (2 points) a. free energy b. entropy c. enthalpy d. thermodynamics. e. equilibrium. 18. The first law of thermodynamics states that the total energy in the universe is (2 points) a. b. c. d. e. decreasing. increasing. constant. being converted to free energy. being converted to matter. 19. How does the second law of thermodynamics apply to living organisms? (2 points) a. b. c. d. As energy transformations occur, free energy increases and unusable energy decreases. All of the reactions in an organism require an input of energy The potential energy of ATP is converted to kinetic energy, as with muscle contractions. Living organisms require a constant input of energy to maintain complex structures and order. It does not apply; the complexity of organisms contradicts the second law e. 20. What is the correct order in which the following molecules would be produced if phosphate ions were removed from ATP one at a time? (2 points) a. ATP, ADP, AMP, adenosine b. AMP, ADP, ATP, adenosine c. Adenosine, ATP, AMP, AD d. ATP, AMP, ADP, adenosine e. ADP, adenosine, AMP, ATP 21. The hydrolysis of sucrose to glucose and fructose is exergonic. However, if sucrose is dissolved in water and the solution is kept overnight at room temperature, there is no detectable conversion to glucose and fructose. Why? (2 points) a. The change in free energy of the reaction is positive. b. The activation energy of the reaction is high. c. The change in free energy of the reaction is negative. d. This is a hydrolysis reaction, so it requires an input of energy. e· The free energy of the products is higher than the free energy of the reactants.
Explanation / Answer
16) The sum total of all chemical reactions that takes place in a living structure is called as its metabolism. (option e). Metabolism can be either synthesis or breakdown of an organic molecule.
Entropy of a system is defined as the amount of system's thermal energy per unit temperature that is unavailable for doing useful work.
17) In a closed system, the total energy that includes both usable and unusable energy is called as enthalpy (option c). Entropy includes only unusable energy.
18) The first law of thermodynamics states that the total energy in the universe is constant (option c).
19) The second law of thermodynamics states that in energy conversion, some energy is wasted as heat and therefore entropy of the system always increase. To compensate this, living organisms require constant input of energy to maintain complex structures and order (option d).
20) The order of reaction if phosphate ions were removed from ATP one at a time are, ATP, ADP, AMP and adenosine (option a).
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.