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Energy

Biology Midterm Vocabulary

WordDefinition
radiant energy energy in the form of light waves that can travel through a vacuum
pigment molecule containing atoms that enable it to absorb certain wavelengths of light
chemical reaction occurs when chemical bonds between atoms are broken, forming a new substance
reactant substances that are broken apart in chemical reactions
product new substances that are formed
activation energy energy needed to start a chemical reaction
free energy extra energy from reactions
exergonic a reaction that releases energy
endergonic/endothermic a reaction that takes up energy
catalyst a substance that alters a chemical reaction so that it can proceed at a lower activation rate
enzyme catalyst used to trigger and control certain reactions
substrate reactant to which an enzyme binds
active site site where substrate and enzyme bind and the reaction occurs
pH indicator of how acidic or basic substances are
Created by: QueChaT
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