No, biology is not just the study of proteins. While proteins are a crucial part of living organisms and play a vital role in many biological processes, biology encompasses a much broader scope.

Here's why:

* Biology studies all aspects of life: From the smallest molecules to the largest ecosystems, biology investigates the structure, function, growth, origin, evolution, and distribution of living organisms.

* Other important areas of study: Biology includes fields like genetics, cell biology, evolution, ecology, botany, zoology, and many more. Each of these fields explores different aspects of life and involves studying various molecules, structures, and processes beyond just proteins.

* Proteins are one building block: While proteins are essential components of living organisms, they are not the only ones. Other important molecules include carbohydrates, lipids, nucleic acids (DNA and RNA), and many others.

So, while proteins are a significant focus in biology, they are just one part of a vast and intricate world of life that biology aims to understand.