CBSE Class 12 Biology Syllabus 2023-24: Exam Pattern and Preparation Guide

Posted: Jun 15, 2026 04:35 PM IST
Updated: Aug 16, 2026 09:08 PM IST
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Preparing for the board examinations requires a strategic approach, especially for a subject as comprehensive as Biology. The CBSE Class 12 Syllabus 2023-24 provides the foundational framework students need to excel. By understanding the marking scheme and the depth of each unit, students can better allocate their study time for maximum efficiency.

CBSE Class 12 Biology Assessment Structure

The total assessment for Class 12 Biology is 100 marks. This is bifurcated into a theory examination worth 70 marks and a practical examination worth 30 marks. It is crucial for students to note that the Central Board of Secondary Education does not provide grace marks for this subject. Therefore, consistent preparation through official resources, such as those found on www.cbseacademic.nic.in, is vital.

CBSE Class 12 Biology Syllabus 2023-24
Unit Title Marks
VIReproduction16
VIIGenetics and Evolution20
VIIIBiology and Human Welfare12
IXBiotechnology and its Applications12
XEcology and Environment10
TotalTotal70

Practical Evaluation Scheme

The 30-mark practical component is a significant part of your final grade. Success here depends on your proficiency in experiments and your ability to articulate concepts during the viva voce.

Practical Evaluation Scheme Breakdown

  • One Major Experiment (5 marks)
  • One Minor Experiment (4 marks)
  • Slide Preparation (5 marks)
  • Spotting (7 marks)
  • Practical Record + Viva Voce (4 marks)
  • Investigatory Project and its Project Record + Viva Voce (5 marks)
Class 12th Biology Practical Evaluation Scheme
Particulars Marks
One Major Experiment 55
One Minor Experiment 2 & 34
Slide Preparation 1& 45
Spotting7
Practical Record + Viva Voce4
Investigatory Project and its Project Record + Viva Voce5
Total30

Recommended Study Materials

To excel in the examination, candidates should rely on officially prescribed literature.

  • Biology, Class-XII, Published by NCERT
  • Other related books and manuals brought out by NCERT
  • Biology Supplementary Material (Revised)

Next Steps for Candidates

After reviewing the syllabus, students should focus on creating a consistent study schedule. Once the board exam dates approach, ensure you monitor the official CBSE portal for admit card releases. Preparing early allows for better revision and reduces pre-exam anxiety.

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