Question

Identify the endergonic reaction from the following reactions?

• A. The synthesis of sugar in photosynthesis
• B. The break down of sugar in cellular respiration
• C. The break down of fats to release energy
• D. break down of sugar in photosynthesis
• E. break down of ATP

Answer 1

The correct option is A The synthesis of sugar in photosynthesis

In endergonic reaction, heat energy is given to the reactants to convert into products.

Photosynthesis process : $6C{O}_2+6H_{2}O\to$ $C_6{H}_{12}{O}_6+6O_2$ (in the presence of sunlight)

As in photosynthesis process heat required is given by the sun, thus photosynthesis process is an endergonic (or endothermic) reaction.

Also in rest of the reactions given, heat energy is released thus these are exothermic reactions.