Central dogma (DNA to RNA to protein)

AP Biology - The Central Dogma of Biology

This video explains the central dogma of biology: how DNA is transcribed into mRNA, which is then translated into proteins that perform cellular functions.

AP Biology - RNA Structure: How RNA Differs from DNA

This video explains the three key differences between RNA and DNA: ribose sugar vs deoxyribose, uracil vs thymine, and single-stranded vs double-stranded structure.

AP Biology - Transcription: Copying DNA into mRNA

This video explains transcription, the process where RNA polymerase copies a DNA gene into mRNA. It covers promoters, base pairing, and differences between prokaryotes and eukaryotes.

AP Biology - mRNA Processing in Eukaryotes

This video explains RNA processing in eukaryotic cells, covering how pre-mRNA is modified with a 5' cap, poly-A tail, and splicing to create mature mRNA ready for translation.

AP Biology - The Genetic Code: Codons and Amino Acids

Learn how mRNA codons work as three-letter genetic codes that ribosomes read to build proteins, including start and stop signals shared across all life.

AP Biology - Translation: From mRNA to Protein

This video explains translation: how ribosomes read mRNA codons, tRNA delivers amino acids, and peptide bonds form proteins until a stop codon signals completion.

AP Biology - Genes vs. Alleles: What's the Difference?

This video explains the difference between genes and alleles, showing how different versions of the same gene can produce traits like brown or blue eyes.