Question

In molecular biology, who proposed that genetic information flows in one direction?

• A. Hargobind Khorana
• B. Francis Crick
• C. Watson and Crick
• D. Marshall Nirenberg

Hint:

The central dogma of molecular biology, proposed by Francis Crick, describes the unidirectional flow of genetic information from DNA to RNA to proteins.

Answer 1

The Correct Option is B

The Central Dogma of Molecular Biology 

Step 1: Understanding the Central Dogma

The central dogma of molecular biology is a foundational concept that describes the flow of genetic information in biological systems. It suggests that:

• DNA is transcribed into RNA
• RNA is translated into Protein

This concept was first proposed by Francis Crick in 1957 and is unidirectional, meaning the flow of information goes in one direction: from DNA to RNA to protein.

Step 2: The Direction of Genetic Information Flow

The central dogma proposes that the genetic information flows in the following direction:

DNA → RNA → Protein

This unidirectional flow of genetic information was a groundbreaking idea and helped to establish the fundamental framework of molecular biology.

Step 3: Conclusion

Thus, the person who proposed the unidirectional flow of genetic information is Francis Crick. Therefore, the correct answer is Option (B).