Fill in the gaps to show what enzymes do and how they work

Enzymes are biological catalysts. Substances that increase the rate of chemical reactions without being used up, through lowering activation energy of the reaction. Enzymes are basically proteins folded into complicated shapes that allow small molecules to fit in them.

Hope it helps.

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.