Skip to content

Biology · a topic

DNA replication, Taught not just answered. 

A real-time, 1:1 lesson on DNA replication: an AI teacher explains it out loud while it visualizes every step. Interrupt it, ask why, and it checks you got it, in 26 languages.

Start Free
All of Biology

The idea

What is DNA replication?

DNA replication is the copying of a cell's DNA before it divides, so each daughter cell gets a complete set. Helicase unwinds the double helix and each strand serves as a template. DNA polymerase adds complementary nucleotides, A with T and G with C, always building in the five-prime to three-prime direction, so one strand is copied continuously while the other is made in short Okazaki fragments joined by ligase. The result is semi-conservative: each new molecule keeps one old strand and one new.

Where it appears: Class 12 CBSE, A-level, IB Biology, AP Biology, NEET, first-year molecular biology.

Where learners get stuck

Why DNA replication is hard

Learners cannot see why one strand must be copied in fragments, which follows from polymerase working in only one direction on antiparallel strands, and they muddle replication with transcription.

The picture a good explanation starts with: A replication fork with the helix opening, the leading strand growing smoothly in one direction and the lagging strand built as short labelled fragments pointing the other way.

A lesson, step by step

How a lesson on DNA replication goes

  1. 01

    Ask

    Type or say "Why is one strand made in Okazaki fragments?" in your own words, in any of 26 languages.

  2. 02

    Plan

    The tutor plans a storyboard, one picture per idea, starting with a replication fork with the helix opening, the leading strand growing smoothly in one direction and the lagging strand built as short labelled fragments pointing the other way.

  3. 03

    Explain

    It explains DNA replication out loud while the picture builds step by step, pitched to your level (Class 12 CBSE and up).

  4. 04

    Interrupt

    Say "wait, why?" or type a doubt: it stops, answers over the picture, and carries on. Ask for a different explanation any time.

  5. 05

    Check

    A checkpoint question makes sure the idea landed, and Tests keep the practice going.

  6. 06

    Your notes

    Upload a PDF or a photo of your class notes or a past paper and the lesson follows your textbook's terms.

Ask it anything

Questions learners ask about DNA replication

  • Why is one strand made in Okazaki fragments?
  • What does semi-conservative replication of DNA mean?
  • How is DNA replication different from transcription?

Any of these, or your own, typed or spoken. The tutor answers on the picture and adapts to how well you are following.

Questions

Asked, Answered

Can LetMeTeach explain DNA replication?

Yes. Ask in your own words and the tutor plans a lesson on DNA replication: it starts with a replication fork with the helix opening, the leading strand growing smoothly in one direction and the lagging strand built as short labelled fragments pointing the other way. Then it explains each step out loud as the picture builds, stops when you say "wait, why?", and ends with a checkpoint question.

Where does DNA replication come up?

Class 12 CBSE, A-level, IB Biology, AP Biology, NEET, first-year molecular biology. The lesson is pitched to your level and the exam or curriculum you follow, and you can upload your own notes or past papers so it uses your textbook's terms.

Can I learn DNA replication in my own language?

Yes. LetMeTeach teaches in 26 languages and plans the lesson in the language you choose rather than translating an English one, so the terms match what your textbook says. The Free plan includes 7 hours a month with no card.

Last updated

Learn DNA replication, Starting now.

Ask "Why is one strand made in Okazaki fragments?" and watch the answer drawn. The Free plan needs no card.

Start Free
How it works