One of the steps in the breakdown of glucose is the conversion of pyruvic acid, CH3COCO2H, into lactic acid, CH3CH(OH)CO2H. This is an example of.

Answer:

11) B

Counting the number of atoms of each element of both pyruvic acid into lactic acid, we can see that lactic acid has 2 more Hydrogen atoms than pyruvic acid.

The addition of hydrogen atoms to a molecule is called reduction.