Module 1
The cell, to scale
What a cell is actually like: how big its parts really are, how crowded it is inside, and why nothing in it can be much larger.
Quantitative7~31 min
Biology
How a cell is built, what its molecules do, and how the instructions are copied and read.
Modules authored
Chapters to work through
min
Taught end to endSyllabus routes
Browse the modules
16Every biology module authored so far, in teaching order.
- Module 2
The four families
Carbohydrates, lipids, proteins and nucleic acids — built by one reaction, and separated by differences smaller than they look.
Quantitative6~26 min - Module 3
Enzymes and energy
What a catalyst does and does not change, why the temperature curve has a peak, and where a cell's ATP really comes from.
Quantitative5~23 min - Module 4
Dividing
The cycle at true proportions, two counters through a mitosis, and where the variation in a gamete actually comes from.
Quantitative5~24 min - Module 5
Ratios, and what they are a statement about
How traits pass from parents to offspring, why the pattern is probabilistic, and why the neat ratios in the textbook are expectations rather than promises.
Quantitative6~35 min - Module 6
What the molecule does
From proving that DNA is the carrier to reading a real genome — copying, transcription, the code, and one base that causes a disease.
Quantitative7~34 min - Module 7
Same genome, different cells
Every cell has every gene. What differs is which ones are being read, how much, and what keeps that stable.
Descriptive5~21 min - Module 8
Working with DNA
Cutting, joining, copying and sizing DNA — six workflow steps, each one traced to the problem it solves.
Quantitative6~26 min - Module 9
How populations change
Variation measured before any mechanism, selection with nothing needing anything, drift fixing an allele that improves nothing, and two kinds of evidence recovering the same history.
Quantitative8~68 min - Module 10
Sorting out what there is
What a species is when the definition stops working, why one organism needs one name, how to read a tree without misreading it, and four things that fit no group at all.
Descriptive6~33 min - Module 11
A plant that cannot move
Every root, stem, leaf and cell wall as an answer to a problem a stationary organism faces — why a potato is a stem, why wood is mostly dead and the trunk is not, and why tree rings tell the age in Kashmir and Kerala but not in a rainforest with no dry season.
Descriptive5~40 min - Module 12
Building a plant from air
Where a tree's mass really comes from, why a leaf is green, the same ATP machine in two organelles, carbon counted atom by atom, and RuBisCO's flaw with its two independent fixes.
Rigorous6~48 min - Module 13
How water climbs and sugar travels
Why suction cannot lift water past ten metres and what a tall tree does instead, why an open stoma always costs water, why phloem flows whichever way the sources and sinks set, and which leaves yellow first when a nutrient runs short.
Rigorous5~45 min - Module 14
Growth, hormones and timing in plants
How a plant with no nerves and no muscles decides where to grow, when to flower and what a cut piece of it becomes — read from concentration and tissue, differential growth and night length.
Quantitative4~27 min - Module 15
Populations, energy and where it all goes
Why an age pyramid predicts, what a carrying capacity is a property of, how long a food chain can be, and why succession so often does not arrive.
Quantitative7~55 min - Module 16
How much life there is, and what is happening to it
Why nobody knows how many species exist, why there are more of them towards the equator, and what area has to do with how many a habitat can hold.
Quantitative5~40 min
Against the NCERT Biology, Classes 11-12, with the Class 9-10 Science biology chapters syllabus
How much of the examined syllabus this platform currently teaches — not how far you have got through it. Finishing everything here would still leave the topics below uncovered.
152 of 390 line items · 39%17 chapters with nothing yet21 partially coveredClass 9: 24%Class 10: 26%Class 11: 42%Class 12: 43%
Not taught here at all
- Class 9, Chapter 7: Diversity in Living Organisms — 10 line items
- Class 9, Chapter 8: Why Do We Fall Ill — 7 line items
- Class 10, Chapter 7: How do Organisms Reproduce — 9 line items
- Class 11, Chapter 3: Plant Kingdom — 9 line items
- Class 11, Chapter 4: Animal Kingdom — 10 line items
- Class 11, Chapter 7: Structural Organisation in Animals — 8 line items
- Class 11, Chapter 14: Breathing and Exchange of Gases — 9 line items
- Class 11, Chapter 15: Body Fluids and Circulation — 11 line items
- Class 11, Chapter 16: Excretory Products and their Elimination — 9 line items
- Class 11, Chapter 17: Locomotion and Movement — 8 line items
- Class 11, Chapter 18: Neural Control and Coordination — 10 line items
- Class 11, Chapter 19: Chemical Coordination and Integration — 9 line items
- Class 12, Chapter 1: Sexual Reproduction in Flowering Plants — 10 line items
- Class 12, Chapter 2: Human Reproduction — 10 line items
- Class 12, Chapter 3: Reproductive Health — 8 line items
- Class 12, Chapter 7: Human Health and Disease — 12 line items
- Class 12, Chapter 8: Microbes in Human Welfare — 7 line items
238 line items are not taught here yet. A line item counts as covered only when a chapter teaches the whole of it, and coverage says nothing about depth — so this is a floor on readiness, not a measure of it.