Biology SL
Biology SL
4
Chapters
553
Notes
Theme A - Unity & Diversity
Theme A - Unity & Diversity
Theme B - Form & Function
Theme B - Form & Function
Theme C - Interaction &  Interdependence
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Theme D - Continuity & Change
IB Resources
Theme D - Continuity & Change
Biology SL
Biology SL

Theme D - Continuity & Change

Key Roles of DNA Enzymes in Replication Explained

Word Count Emoji
383 words
Reading Time Emoji
2 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

Meet the Band Members 🎤

  • DNA Primase: The Rockstar who starts the show
  • DNA Polymerase III: The main performer who keeps the rhythm going
  • DNA Polymerase I: The versatile artist who corrects any off-tunes
  • DNA Ligase: The technician who ensures the whole performance is seamlessly connected

DNA Primase - "Starting the DNA Jam! 🎸

  • Type? RNA polymerase.
  • Role? Sets the stage for DNA replication.
  • How? Creates an RNA primer (~10 RNA nucleotides) on the template DNA strand.
    • 🌍 Real-world Example: Imagine you're painting a mural. The RNA primer is like the initial sketch which guides where the rest of the paints (nucleotides) will go.
  • Frequency? On the leading strand: only once; on the lagging strand: every 100-200 nucleotides.

DNA Polymerase III - The Main Show! 🎶

  • Role? Assembles DNA nucleotides complementary to the template strand.
  • Direction? Adds nucleotides from 5′ to 3′ direction.
  • Where? Binds to the 3' side of an RNA primer.
  • Special Feature? Proofreads each nucleotide it adds.
    • 🌍 Real-world Example: It's like a musician listening to each note they play, making sure it sounds right.

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IB Resources
Theme D - Continuity & Change
Biology SL
Biology SL

Theme D - Continuity & Change

Key Roles of DNA Enzymes in Replication Explained

Word Count Emoji
383 words
Reading Time Emoji
2 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

Meet the Band Members 🎤

  • DNA Primase: The Rockstar who starts the show
  • DNA Polymerase III: The main performer who keeps the rhythm going
  • DNA Polymerase I: The versatile artist who corrects any off-tunes
  • DNA Ligase: The technician who ensures the whole performance is seamlessly connected

DNA Primase - "Starting the DNA Jam! 🎸

  • Type? RNA polymerase.
  • Role? Sets the stage for DNA replication.
  • How? Creates an RNA primer (~10 RNA nucleotides) on the template DNA strand.
    • 🌍 Real-world Example: Imagine you're painting a mural. The RNA primer is like the initial sketch which guides where the rest of the paints (nucleotides) will go.
  • Frequency? On the leading strand: only once; on the lagging strand: every 100-200 nucleotides.

DNA Polymerase III - The Main Show! 🎶

  • Role? Assembles DNA nucleotides complementary to the template strand.
  • Direction? Adds nucleotides from 5′ to 3′ direction.
  • Where? Binds to the 3' side of an RNA primer.
  • Special Feature? Proofreads each nucleotide it adds.
    • 🌍 Real-world Example: It's like a musician listening to each note they play, making sure it sounds right.

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Biology SL. Subscribe now and get closer to that 45 🌟