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watch it move, then reviseAnimated biology lessons for NEET
Most of biology happens where you can't see it: chromosomes crossing over, Rhizobium entering a root hair, electrons moving down a chain. Every Biowiz video is hand-animated so you watch these processes happen step by step instead of memorising them from a page.
Root Nodule Formation
The most-read lesson on Biowiz: how a legume and Rhizobium work together to fix nitrogen.
Read the notes →How to study with these videos
- Watch the animationSee the whole process once, start to finish, without pausing to take notes.
- Read the notesOpen the lesson notes to revise the NCERT points, diagrams and NEET tips.
- Take the testMost lessons end with a short test, so you know what to watch again.
All video lessons
tap any video to play it right here
Root Nodule Formation
How Rhizobium enters a legume root hair, forms an infection thread and builds a nodule where leghaemoglobin protects nitrogenase. The most-read lesson on Biowiz.
Meiosis
Meiosis I and II stage by stage, from leptotene to telophase II, with synapsis, crossing over and chiasmata animated so the sub-stages of prophase I finally make sense.
Mitosis
Prophase, metaphase, anaphase and telophase, and how cytokinesis differs in plant and animal cells. Watch the chromosomes line up and split.
Structure of a Prokaryotic Cell
Cell envelope, mesosomes, nucleoid, plasmids, pili and flagella – every part of a bacterial cell and what it does.
Life Cycle of Bryophytes
The moss life cycle from spore to protonema to leafy gametophyte, and how the dependent sporophyte grows on it.
Life Cycle of Pteridophytes
From the fern sporophyte and its sori to the tiny prothallus, and why fertilisation still needs water.
Diatoms
The chief producers of the oceans: their silica frustule with two overlapping halves, and how diatomaceous earth forms.
Electron Transport System
How NADH and FADH2 pass electrons through complexes I–IV to oxygen, and how ATP synthase makes ATP.
Photophosphorylation
Cyclic and non-cyclic photophosphorylation compared – which photosystems take part, and where ATP and NADPH come from.
Osmosis
Water potential, solute potential and pressure potential, and how water moves across a selectively permeable membrane.
Turgidity and Plasmolysis
What happens to a plant cell in hypotonic, isotonic and hypertonic solutions, from a turgid cell to incipient plasmolysis.
Secondary Growth in Dicot Root
How the vascular cambium forms a complete ring in the root, and how cork cambium builds the periderm.
Cockroach – General Points
Habitat, body plan and the head, thorax and abdomen of Periplaneta americana, NCERT's model insect.
DNA Replication
Semi-conservative replication at the fork: helicase, primers, DNA polymerase, and the leading and lagging strands with Okazaki fragments.
Transcription
How RNA polymerase reads the template strand – initiation, elongation and termination, and processing in eukaryotes.
lac Operon
Jacob and Monod's lac operon: how the repressor switches the genes off, and how lactose switches them on.
Non-disjunction of Chromosomes
When chromosomes fail to separate in meiosis – and how this causes Down's, Turner's and Klinefelter's syndromes.
Pollination
Autogamy, geitonogamy and xenogamy, and the agents that carry pollen – wind, water, insects and birds.
One-minute revision shorts
quick recaps for the night before the test
ATP
Biomolecules · notes →Glands
Animal tissues · notes →Parts of a Leaf
Morphology · notes →Types of Leaves
Morphology · notes →Asexual Spores in Fungi
Biological Classification · notes →Want a topic animated next?
New lessons are made from what students ask for. Leave a comment under any video on YouTube with the topic you find hardest, and subscribe so you don't miss it when it's out.
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