Interactive Biology Animations for Students | Shikkha Web

Grade 9–11

Mitosis cell division

Watch mitosis happen: interphase, prophase, metaphase, anaphase, telophase and cytokinesis in an interactive animation, with chromosome counting rules and solved problems.

Grade 8–11

Diffusion and Osmosis

Diffusion vs osmosis explained with a live particle simulation: definitions, the difference table, tonicity, plasmolysis, turgor and imbibition, with solved examples.

Grade 7–11

Photosynthesis

Photosynthesis explained: the equation, light-dependent stage, Calvin cycle and limiting factors. Change light, CO₂ and temperature in a live leaf simulation.

Grade 9–11

The human heart: structure and function

See the four chambers, valves, lub-dub sounds and a live ECG in one animated heart. Learn double circulation, the cardiac cycle and cardiac output.

Grade 10–12

Mendelian Genetics

Learn Mendel's laws with a real Punnett-square builder: monohybrid and dihybrid crosses, test crosses, incomplete dominance, blood-type codominance, and sex determination — every ratio computed live.

Grade 11–12

DNA Replication

DNA replication explained: semi-conservative copying, key enzymes, leading vs lagging strand, Okazaki fragments and the Meselson-Stahl proof — in a live simulation.

Grade 9–11

Cellular Respiration

Cellular respiration explained: aerobic vs anaerobic respiration, glycolysis, the Krebs cycle, the electron transport chain and ATP yield. Run the mitochondrion simulation and see the numbers add up.

Grade 9–11

Enzyme Action

What an enzyme is, the active site, lock-and-key vs induced-fit models, how temperature, pH and inhibitors change its rate, and the Michaelis-Menten equation — explore it live in a simulation.

Grade 10–11

The Nerve Impulse and the Action Potential

See a stimulus above threshold (-55 mV) fire an action potential that races down the axon — continuous or saltatory — and release neurotransmitter at the synapse, with the real formulas.

Grade 9–11

The Nephron and Urine Formation

See how a kidney filters about 180 litres of fluid a day yet passes only around 1.50 litres of urine — filtration, reabsorption and the glucose threshold, with the real formulas.

Grade 9–11

Meiosis Cell Division

What is meiosis, what is crossing over, and how is it different from mitosis? Run a 2n = 4 cell through prophase I to telophase II yourself, with worked examples.

Grade 9–10

Digestive System

What is digestion, which enzyme acts where, and how do villi absorb nutrients? Run food's journey from mouth to large intestine yourself, with worked examples.