CBSE Class 11 Biology Syllabus 2023-24: Complete Guide & Marks Weightage

Posted: Jun 15, 2026 04:35 PM IST
Updated: Aug 16, 2026 09:10 PM IST
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The CBSE Class 11 Biology curriculum is a pivotal stepping stone for students aiming for professional careers in medicine, biotechnology, pharmacy, and various life sciences. By aligning your studies with the official 2023-24 framework, you gain a competitive edge for national-level entrance examinations like NEET and AIIMS.

Core Units and Marks Weightage

The theoretical component of the course consists of 70 marks, distributed across five core units. Understanding this distribution is essential for effective time management during your exam preparation.

  • Unit I: Diversity of Living Organisms - 15 marks
  • Unit II: Structural Organization in Plants and Animals - 10 marks
  • Unit III: Cell: Structure and Function - 15 marks
  • Unit IV: Plant Physiology - 12 marks
  • Unit V: Human Physiology - 18 marks
  • Practical Work - 30 marks
S.No. Title Marks
I.Diversity of Living Organisms15
II.Structural Organization in Plants and Animals10
III.Cell: Structure and Function15
IV.Plant Physiology12
V.Human Physiology18
Total70
Practical Work30
Grand Total100

Practical Evaluation Scheme

Practical examinations account for 30 marks and require a hands-on approach. Note that for ethical reasons, no live animals or specimens are to be displayed during Animal Kingdom studies, and virtual models are utilized for human skeletal studies.

Evaluation Scheme Marks
One Major Experiment Part A (Experiment No- 1,3,7,8)5
One Minor Experiment Part A (Experiment No- 6,9,10,11,12,13)4
Slide Preparation Part A (Experiment No- 2,4,5)5
Spotting Part B7
Practical Record + Viva Voce4
Project Record + Viva Voce5
Total30 Marks

How to Access the Official Syllabus

To ensure you are following the most updated guidelines, you should retrieve the documentation directly from the source.

  1. Visit the official CBSE academic website at www.cbseacademic.nic.in.
  2. Navigate to the 'Curriculum' section for the 2023-24 academic session.
  3. Select the 'Senior School Curriculum' tab.
  4. Locate 'Biology' under the Academic Electives list to download the detailed PDF.
  5. Cross-reference the units provided in the syllabus with your NCERT 'Biology Class-XI' textbook to create your study schedule.

After verifying the syllabus, students should organize their notes based on these weightages and begin practice tests to ensure readiness for both internal practical assessments and external board examinations.

Frequently Asked Questions (FAQs)

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