How many hours per day should I study Biology for Class 11 boards?

Tamil Nadu Class 11 Biology 30-Day Revision Plan — Samacheer Kalvi

How to Use This Plan

Start 30 days before your exam.
Each day has a chapter focus + revision task.
Mark off each day as you complete it.
Solve the corresponding unit test on Day 15 and Day 30.

Week 1 — Diversity of Life (Days 1–7)

Day	Focus	Task
1	Living World	Read notes, memorise taxonomic hierarchy and five-kingdom features
2	Plant Kingdom	Algae pigments + reserve food; bryophyte vs pteridophyte comparison
3	Plant Kingdom	Gymnosperm vs Angiosperm; alternation of generations diagram
4	Animal Kingdom	Eight invertebrate phyla features and examples
5	Animal Kingdom	Seven vertebrate classes with features and examples
6	Review Days 1–5	Make flashcards for all kingdom/phylum examples
7	Practice	Attempt 20 MCQs on Diversity chapters

Week 2 — Cell Biology (Days 8–14)

Day	Focus	Task
8	Cell: Unit of Life	Organelle functions table; fluid mosaic model
9	Cell: Unit of Life	Prokaryote vs Eukaryote; draw mitochondria and chloroplast
10	Cell Division	Cell cycle phases and events
11	Cell Division	Mitosis PMAT; Meiosis I sub-stages (Prophase I)
12	Cell Division	Meiosis II; significance of meiosis; crossing over
13	Transport in Plants	Osmosis, water potential; apoplast/symplast; cohesion-tension
14	Mineral Nutrition	Macro/micronutrients; deficiency symptoms; nitrogen fixation

Day 14 evening: Solve Volume 1 Unit Test.

Week 3 — Plant Physiology (Days 15–21)

Day	Focus	Task
15	Photosynthesis	Chloroplast structure; light reactions (PS II, ETC, PS I)
16	Photosynthesis	Calvin cycle steps; C3 vs C4; photorespiration
17	Respiration	Glycolysis; link reaction; Krebs cycle products
18	Respiration	ETC; chemiosmosis; anaerobic respiration; ATP tally
19	Plant Growth	Five PGRs and functions; auxin vs cytokinin
20	Plant Growth	Photoperiodism (SDP/LDP); vernalisation
21	Review + MCQs	20 MCQs on Plant Physiology

Week 4 — Human Physiology (Days 22–28)

Day	Focus	Task
22	Digestion	Digestive organs; enzymes table (source, substrate, product)
23	Digestion	Absorption pathways; liver functions; disorders
24	Breathing	Pulmonary volumes; inspiration/expiration mechanism
25	Breathing	Gas transport (O₂ and CO₂ percentages); carbonic anhydrase
26	Circulation	Blood composition; WBC types; blood groups ABO and Rh
27	Circulation	Cardiac cycle; ECG waves; heart sounds; cardiac output
28	Excretion	Nephron structure; urine formation three steps; hormonal control

Final 2 Days (Days 29–30)

Day	Activity
29	Solve Volume 2 Unit Test + review wrong answers
30	Full model paper (70 marks, 3 hours); then review answer key

Daily Revision Habits

Spend 15 minutes every morning revising yesterday's topic.
Keep a "Mistakes Book" — note every wrong answer and the correct one.
Draw at least one diagram per day (nephron, cardiac cycle, chloroplast, etc.).

NEET Note

If you are also preparing for NEET, supplement each Samacheer chapter with the corresponding NCERT chapter on the same day. NEET questions are NCERT-based but Samacheer covers the same concepts.

Frequently Asked Questions

For the last 30 days, aim for 2–3 hours of Biology per day if you are studying all subjects. If only Biology is pending, 4–5 hours/day is sufficient to cover everything.