Final answer:
Enzymes and many hormones are proteins that play crucial roles in the biological functions of organisms, acting as catalysts and messengers respectively. The correct option is B.
Step-by-step explanation:
The similarity between enzymes and hormones is that both are typically proteins. Enzymes are biological catalysts that speed up chemical reactions in the body, while hormones are chemical messengers that communicate between different parts of the body to coordinate various functions.
It is important to note that not all hormones are proteins; some are derived from lipids, such as steroid hormones. Nevertheless, many hormones and enzymes share a protein-based structure.