The reaction A B C has a Delta Go of -20 kJ/mol at 25° C. Starting under standar

Question

The reaction A B C has a Delta Go of -20 kJ/mol at 25° C. Starting under standard conditions, one can predict that P O A C will rapidly break down to A B. O B at equilibrium, the concentration of C will be less than the concentration of A. O C) at equilibrium, the concentration of B will exceed the concentration of A. O D) at equilibrium, the concentration of C will be much greater than the concentration of A or B. o E) when A and B are mixed, the reaction will proceed rapidly toward formation of Cand does not need enzyme catalysis.

Explanation / Answer

Please find the answers below and explanations in parentheses:

Answer 1: Choice D (The reaction represents an enzyme catalyzed reaction with delta G having a large negative value. The negative value of delta G represents that the reaction is spontaneous in nature and does not require supply of external energy to take place. Importantly, since the reaction is spontaneous and thermodynamically stable and given the fact that the sign of single-sided reaction can be seen in the reaction, it appears that the reaction co-ordinates promote formation of product i.e. C under normal conditions. Thus at equilibrium, concentration of C will exceed than that of the reactants.)

Answer 2: Choice E (LDH is the enzyme present in virtually all living cells. This enzyme is involved in conversion of glucose into products with release of enery which can be utilized by the cells. The process generally takes place in presence of oxygen but can also occur in its absence or hypoxia. In absence of LDH enzyme, cells will accumulate huge amount of glucose and glycolysis will be impaired. This will make the cells insulin-resistant and thus, the overall glycolysis and gluconeogenesis mechanisms will be imbalanced.)

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