The small energy input every chemical reaction needs to get started is the:
AActivation energy
BIonisation energy
CDissociation energy
DSublimation energy
Answer & Solution
Correct answer: A. Activation energy
1. Even a reaction that releases energy overall does not start on its own contact.
2. The reacting molecules must first be pushed into a strained arrangement.
3. This small amount of energy input necessary for all chemical reactions to occur is called the activation energy.
4. It is abbreviated EA and is always positive.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 6 'Metabolism', sections 6.1-6.5_
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