SECTION 2.4: ENZYMES.

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Presentation transcript:

SECTION 2.4: ENZYMES

WHAT ARE ENZYMES? Biological catalysts Proteins! Very large!!!

Enzymes lower the energy needed for a chemical reaction to occur ENERGY OF ACTIVATION!!!!

Enzymes speed up chemical reactions

HOW DO ENZYMES WORK? Each enzyme catalyzes only ONE chemical reaction Enzymes are SPECIFIC A particular enzyme can only speed up its own unique reaction Why? Enzymes have a unique shape

Because enzymes are proteins, they can be damaged (denatured) by changes in: pH Salt concentration Heat

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