## TL;DR
The Central Dogma describes the flow of genetic information from DNA to RNA to protein. CRISPR-Cas9 has revolutionized molecular biology by enabling precise genome editing in any organism.

## Core Explanation
DNA replication: helicase unwinds the double helix; DNA polymerase adds complementary nucleotides (A-T, G-C). Transcription: RNA polymerase synthesizes mRNA from the template DNA strand. Translation: ribosomes read mRNA codons (3-base units), tRNAs deliver corresponding amino acids, forming polypeptide chains.

## Detailed Analysis
CRISPR-Cas9 mechanism: guide RNA (gRNA) matches target DNA sequence; Cas9 creates a double-strand break; cellular repair mechanisms (NHEJ or HDR) enable gene knockout or precise editing. Applications include gene therapy, agricultural improvement, and disease model creation.

## Further Reading
- Nature Reviews Molecular Cell Biology
- Addgene: CRISPR Guide
- MIT Biology: Molecular Biology