An endergonic reaction releases energy. Group of answer choices True False
The Correct Answer and Explanation is:
Correct Answer: False
An endergonic reaction does not release energy. Instead, it requires an input of energy from its surroundings to proceed. In thermodynamics, an endergonic reaction is characterized by a positive Gibbs free energy change (ΔG > 0). This means that the energy of the products is greater than that of the reactants, and energy must be absorbed for the reaction to occur.
To understand this better, think of an endergonic reaction as similar to pushing a rock uphill. The rock does not roll up on its own; it needs energy to be moved against gravity. In the same way, molecules involved in an endergonic reaction must absorb energy to move from a lower energy state (reactants) to a higher one (products).
A common example of an endergonic process is photosynthesis, where plants absorb energy from sunlight to convert carbon dioxide and water into glucose and oxygen. The energy from sunlight is stored in the chemical bonds of glucose, making it a higher-energy product compared to the reactants.
In contrast, exergonic reactions release energy (ΔG < 0). These are spontaneous reactions in which the products have less free energy than the reactants. Cellular respiration is an example of an exergonic reaction where glucose is broken down, and energy is released for the cell to use.
It is also important to note that in biological systems, endergonic reactions are often coupled with exergonic reactions. This means that the energy released by an exergonic process, like the hydrolysis of ATP, is used to drive an endergonic one, making the overall process energetically favorable.
In conclusion, the statement that an endergonic reaction releases energy is false because such reactions require an input of energy, not the release of it.
