The unidirectional flow of genetic information from DNA `to` RNA `to` protein is referred to as the ................ in molecular biology.

Explanation

### Step-by-Step Solution:

1. **Understanding the Flow of Genetic Information**: The question asks about the flow of genetic information from DNA to RNA and then from RNA to protein. This flow is essential in molecular biology as it describes how genetic information is expressed in living organisms.

2. **Identifying the Key Processes**: The processes involved in this flow are:
- **Transcription**: The process where the information in DNA is copied into RNA.
- **Translation**: The process where the information in RNA is used to synthesize proteins.

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