From DNA to protein - 3D

00:02:42
https://www.youtube.com/watch?v=gG7uCskUOrA

Résumé

TLDRThe video covers the fundamental biological processes that occur in human cells, specifically how genetic information is stored, processed, and translated into proteins. It begins by describing the structure of the human genome, which is housed in the nucleus of cells as 23 chromosome pairs. Each chromosome contains DNA, with genes providing the blueprint for proteins. When a gene is activated, RNA polymerase starts transcription, creating a messenger RNA (mRNA) strand from the DNA template. This mRNA is then processed and transported to the cytoplasm, where ribosomes bind to it. The ribosome reads the mRNA sequence to synthesize a protein by assembling a chain of amino acids, delivered by transfer RNA. Once the chain is complete, it folds into a complex three-dimensional structure to become a functional protein.

A retenir

  • 🔬 Cells are the basic unit of all living tissues.
  • 📘 Human genome is organized into 23 chromosome pairs.
  • 🧬 DNA is tightly wrapped around histones.
  • 🧪 Genes contain instructions to make proteins.
  • ⚙️ RNA polymerase initiates transcription of DNA.
  • ➡️ mRNA is processed and moves to the cytoplasm.
  • 🔗 Ribosomes in the cytoplasm assemble proteins.
  • 🔁 Transfer RNA brings amino acids during protein synthesis.
  • 💡 Proteins are formed from 20 types of amino acids.
  • 🌀 The amino acid chain folds into a 3D structure to form a protein.

Chronologie

  • 00:00:00 - 00:02:42

    The video explains the basic structure of cells, highlighting the role of the nucleus which houses the genome divided across 23 chromosome pairs. Genes within the DNA provide protein-making instructions. When activated, RNA polymerase creates messenger RNA (mRNA) during transcription by reading DNA code. The resulting mRNA exits the nucleus for protein synthesis, where ribosomes translate the mRNA code into amino acid chains. Each triplet of mRNA bases corresponds to an amino acid, delivered by transfer RNA, creating a protein.

Carte mentale

Mind Map

Questions fréquemment posées

  • What is transcription in genetics?

    Transcription is the process where an enzyme called RNA polymerase synthesizes a strand of messenger RNA (mRNA) from a DNA template.

  • How many types of amino acids are used in protein synthesis?

    There are 20 different types of amino acids used in protein synthesis.

  • Where does the messenger RNA go after transcription?

    The messenger RNA moves out of the nucleus into the cytoplasm.

  • What role do ribosomes play in protein synthesis?

    Ribosomes read the code in the messenger RNA and produce a chain of amino acids that eventually form a protein.

  • What are histones?

    Histones are proteins around which DNA is tightly packaged within the chromosomes.

  • What is the genome divided into in humans?

    In humans, the genome is divided into 23 pairs of chromosomes.

  • What happens to the amino acid chain to become a protein?

    Once the amino acid chain is complete, it folds into a complex 3D shape to form a protein.

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Défilement automatique:
  • 00:00:06
    here is a cell the basic unit of all
  • 00:00:08
    living tissue
  • 00:00:11
    in most human cells there is a structure
  • 00:00:13
    called the nucleus
  • 00:00:16
    the nucleus contains the genome
  • 00:00:19
    in humans the genome is split between 23
  • 00:00:22
    pairs of chromosomes
  • 00:00:25
    each chromosome contains a long strand
  • 00:00:28
    of dna
  • 00:00:29
    tightly packaged around proteins called
  • 00:00:31
    histones
  • 00:00:35
    within the dna are sections called genes
  • 00:00:39
    these genes contain the instructions for
  • 00:00:41
    making proteins
  • 00:00:45
    when a gene is switched on an enzyme
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    called rna polymerase attaches to the
  • 00:00:50
    start of the gene
  • 00:00:52
    it moves along the dna making a strand
  • 00:00:55
    of messenger rna out of three bases in
  • 00:00:58
    the nucleus
  • 00:01:00
    the dna code determines the order in
  • 00:01:02
    which the free bases are added to the
  • 00:01:04
    messenger rna
  • 00:01:07
    this process is called transcription
  • 00:01:15
    before the messenger rna can be used as
  • 00:01:17
    a template for the production of
  • 00:01:19
    proteins it needs to be processed
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    this involves removing and adding
  • 00:01:25
    sections of rna
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    the messenger rna then moves out of the
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    nucleus into the cytoplasm
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    protein factories in the cytoplasm
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    called ribosomes bind to the messenger
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    rna
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    the ribosome reads the code in the
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    messenger rna to produce a chain made up
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    of amino acids
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    there are 20 different types of amino
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    acid
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    transfer rna molecules carry the amino
  • 00:02:01
    acids to the ribosome
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    the messenger rna is read three bases at
  • 00:02:08
    a time
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    as each triplet is read a transfer rna
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    delivers the corresponding amino acid
  • 00:02:18
    this is added to a growing chain of
  • 00:02:20
    amino acids
  • 00:02:26
    once the last amino acid has been added
  • 00:02:28
    the chain folds into a complex 3d shape
  • 00:02:32
    to form the protein
  • 00:02:41
    you
Tags
  • genes
  • transcription
  • DNA
  • RNA
  • proteins
  • ribosomes
  • amino acids
  • nucleus
  • cytoplasm
  • chromosomes