Which of these reactions requires a net input of energy from its surroundings?
exergonic
catabolic
ATP $\rightarrow$ ADP $+P$
hydrolysis
endergonic
Answer (2)
The reaction that requires a net input of energy from its surroundings is the endergonic reaction. Exergonic, catabolic, and ATP hydrolysis reactions release energy and do not require energy input. Therefore, among the given options, endergonic is the correct answer.
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Exergonic, catabolic reactions, ATP hydrolysis, and hydrolysis release energy.
Endergonic reactions require energy input.
The reaction that requires a net input of energy is endergonic.
Therefore, the answer is endergonic.
Explanation
Analyzing the Options Let's analyze each of the given options to determine which one requires a net input of energy from its surroundings.
Defining the Reactions
Exergonic reactions release energy into their surroundings. Therefore, they do not require an input of energy.
Catabolic reactions involve the breakdown of complex molecules into simpler ones, typically releasing energy. Thus, they do not require an input of energy.
ATP → ADP + P represents the hydrolysis of ATP (adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate. This reaction releases energy and does not require an energy input.
Hydrolysis is a chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water. This process typically releases energy.
Endergonic reactions require a net input of energy from their surroundings to proceed.
Identifying the Correct Reaction Based on the definitions, only endergonic reactions require a net input of energy from their surroundings.
Final Answer Therefore, the reaction that requires a net input of energy from its surroundings is the endergonic reaction.
Examples
In the context of cooking, an endergonic reaction is similar to baking a cake. You need to put energy (heat) into the ingredients for the cake to form. Without the input of energy, the reaction won't occur, and you won't get your cake. Similarly, endergonic reactions in chemistry and biology need energy to proceed and create new products.
