He is an expert in biochemistry.

I am majoring in biochemistry at university.

Sexology is the scientific study of human sexual behavior and sexuality.

The sexology class is very interesting.

I am majoring in biophysics at university.

My toxicology textbook is very difficult to understand.

My specialty is psychiatry.

I am majoring in phonetics at university.

I used the student discount at the movie theater.

Cell biology is the study of the structure and function of cells, which are the basic units of life.