Molecular biology is the study of molecular underpinnings of the processes of replication, transcription,translation, and cell function. The central dogma of molecular biology where genetic material is transcribed into RNA and then translated into protein, despite being an oversimplified picture of molecular biology, still provides a good starting point for understanding the field. @wikipedia

If your research topic is on proteins, you probably have to use molecular biological techniques like primer designation, PCR, electrophoresis, restriction endonuclease, transformation etc day and day over. Related protocols can be found in our website.

If your research topic is on behaviors, physiology, botany etc, the experiments based on DNA and proteins provide more convincing evidences.