Question

1. how do enzymes speed up chemical reactions in organisms? 1 point

enzymes increase the energy required for a reaction to begin.
enzymes decrease the energy required for a reaction to begin.
enzymes have no effect on the energy required for a reaction to begin.
enzymes maintain the energy needed for a reaction to begin.

Explanation:

Enzymes are biological catalysts. They lower the activation - energy, the energy required for a reaction to start, thus speeding up reactions.

Answer:

Enzymes decrease the energy required for a reaction to begin.