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The central dogma of molecular biology (Francis Crick) states:
AProtein → RNA → DNA
BRNA → Protein → DNA
CRNA → DNA → Protein
DDNA → RNA → Protein
Answer & Solution
Correct answer: D. DNA → RNA → Protein
**Central dogma**: genetic information flows **DNA → RNA → Protein** (replication → transcription → translation). Some viruses (retroviruses) reverse the first step: **RNA → DNA** via reverse transcriptase.
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