What field of study focuses on the chemistry of living things?

The field of study that focuses on the chemistry of living things is biochemistry. Biochemistry combines principles from both biology and chemistry to explore the chemical processes and substances that occur within living organisms. It examines the molecular mechanisms by which cells and organisms carry out functions, including metabolism, enzyme activity, DNA replication, and cellular signaling.

Biochemistry is essential for understanding processes such as how enzymes catalyze biochemical reactions and how various biomolecules like proteins, carbohydrates, lipids, and nucleic acids interact within biological systems. This field provides insights that are crucial for advancements in medicine, genetics, biotechnology, and many other areas.

In contrast, physics is primarily concerned with the laws of nature and the properties of matter and energy, while microbiology centers on the study of microorganisms, including bacteria, viruses, fungi, and parasites. Astronomy deals with the study of celestial bodies and the universe beyond Earth. Each of these fields has its distinct focus, but biochemistry specifically addresses the chemistry that underlies biology.