How can an unfavorable reaction ( 0)still occur in a metabolic pathway?
A) Link it to another unfavorable reaction.
B) Link it to a favorable reaction.
C) They cannot be used in metabolic pathway reactions.
D) Increase the temperature of the reaction.

Question

How can an unfavorable reaction (  > 0)still occur in a metabolic pathway?
A) Link it to another unfavorable reaction. 
B) Link it to a favorable reaction. 
C) They cannot be used in metabolic pathway reactions. 
D) Increase the temperature of the reaction.

Quizplus · Accepted Answer

An unfavorable reaction can still occur in a metabolic pathway if it is linked to a favorable reaction. This is because the overall energy change of the pathway will be negative, even if some individual reactions in the pathway require an input of energy. By coupling unfavorable reactions to favorable reactions, the pathway can still proceed in a thermodynamically feasible manner.

How Can an Unfavorable Reaction ( > 0)still Occur