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nmdcat.online July 14, 2026

Why does modern genetics validate the “Central Dogma” of molecular biology as a refutation of Lamarckism?

A. Information flows from DNA to RNA to Protein, and cannot flow backward from somatic protein changes to alter DNA sequences.
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B. DNA can replicate itself independently of cellular proteins.
C. RNA acts as a template for protein synthesis in the ribosomes.
D. Proteins can mutate DNA sequences directly in response to stress.

📝 Explanation

The Central Dogma states that genetic information cannot flow backward from proteins (somatic phenotype) to DNA (germline genotype), making Lamarckian inheritance of somatic changes molecularly impossible.

📖 Additional Information

  • Information flows from DNA to RNA to Protein, and cannot flow backward from somatic protein changes to alter DNA sequences.
  • DNA can replicate itself independently of cellular proteins.
  • RNA acts as a template for protein synthesis in the ribosomes.
  • Proteins can mutate DNA sequences directly in response to stress.

The Central Dogma states that genetic information cannot flow backward from proteins (somatic phenotype) to DNA (germline genotype), making Lamarckian inheritance of somatic changes molecularly impossible.

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