Question

The central dogma of molecular genetics states that genetic information flows from :

• A. Amino acids $\to$ Proteins $\to$ DNA
• B. DNA $\to$ RNA $\to$ Proteins
• C. DNA $\to$ RNA $\to$ Carbohydrates
• D. DNA $\to$ Carbohydrates $\to$ Proteins

Answer 1

Answer: (B)

The molecular path of flow of genetic information is explained by central dogma. Accordingly, the flow of genetic information is unidirectional and involves four processes. Replication of DNA copies the genetic information present in it which is transcribed into RNA by RNA polymerase enzyme. The RNA sequence of ribonucleotides is translated into an amino acid sequence of polypeptides by the process of translation. Thus the flow of genetic information is unidirectional and follows the path: DNA-->RNA-->protein. The correct answer is A.