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Which fact is most important in explaining how enzymes speed reactions? Very low potential energy tends to make molecules unstable. High-energy collisions are less common than low-energy collisions. It takes less energy to break a hydrogen bond than a covalent bond. Large molecules collide more energetically than small molecules. Every reaction step adds to the time required for the overall reaction. Study Enzyme Activity.
The chain of amino acids then turns into a unique shape which allows the enzyme to carry out specific chemical reactions -- an enzyme acts as a very effective catalyst for a specific chemical reaction. The enzyme speeds that reaction up extremely.hough RNAs are capable of catalyzing some reactions, most of the biological reactions are catalyzed by proteins. In the absence of enzymatic catalysis, most of the biochemical reactions are so slow that they would not take place under the mild conditions of pressure and temperature that are compatible with life.