Gene expression and regulation
8 videos
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5
Biology - The Central Dogma: DNA to RNA to Protein
This video explains the central dogma of molecular biology: how DNA is transcribed into RNA, which is then translated into proteins through a step-by-step cellular process.
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Biology - DNA Structure: The Double Helix
Learn about DNA structure, nucleotides, base pairing, and the double helix. Discover how 6 feet of DNA fits inside a tiny cell through chromosomes.
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Biology - DNA Replication: Copying the Code
Learn how DNA replication works as helicase unzips the double helix and DNA polymerase creates two identical copies through semi-conservative replication.
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Biology - Transcription: DNA to mRNA
This video explains transcription: how DNA in the nucleus is copied into mRNA by RNA polymerase, then processed and sent to ribosomes for protein synthesis.
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Biology - Translation: mRNA to Protein
This video explains translation, the process where ribosomes read mRNA codons and tRNA delivers amino acids to build proteins inside cells.
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Biology - Gene Regulation: Same DNA, Different Cells
Explains how all cells have identical DNA but become different types through gene regulation, using transcription factors and histone packaging to control which genes are expressed.
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Biology - Mutations: Types and Effects
Learn how point and frameshift mutations alter DNA sequences, change amino acids, and affect protein function. Explores mutation types and their role in genetic variation and evolution.
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Biology - Reading a Codon Chart: From mRNA to Amino Acids
Learn how to use a codon chart to translate mRNA sequences into amino acids and understand how point mutations can affect protein synthesis.