Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?(1 point)

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Responses which answer is correct

Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
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Answer 1

The correct response is:

Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

In cellular respiration, the products (such as carbon dioxide and water) have lower energy compared to the reactants (glucose and oxygen), which means it generally requires less activation energy to start the reaction. In contrast, photosynthesis converts energy from sunlight to form glucose from carbon dioxide and water, which requires a higher amount of energy, making it an endothermic reaction.