CBSE Class 12 Biology Sample Paper 2018 Set A

Read and download the CBSE Class 12 Biology Sample Paper 2018 Set A, designed by expert teachers according to the latest 2025-26 curriculum and examination pattern issued by CBSE, NCERT, and KVS. These Class 12 Biology sample papers include detailed step-by-step solutions, helping students to practice and evaluate their performance against the most recent marking schemes.

Solved Sample Paper for Class 12 Biology PDF

Our Class 12 Biology model papers are important for understanding the weightage of different chapters and the difficulty level of expected questions. By solving these guess papers Class 12 students can identify weak areas and improve time management. We also suggest referring to our Class 12 Biology Question Papers of previous years to further strengthen your exam preparation.

Class 12 Biology Sample Paper with Solutions

SECTION-A

1- Name two animals that exhibit Oestrus cycle. 

2-What is point mutation ? Give one example. 

3- Mention one difference to distinguish an exon from an intron. 

4- dSuggest a molecular diagnostic procedure that detects HIV in a suspected AIDS patient.

5-What does nature’s carrying capacity for a species indicate ? 

 SECTION-B

6-Write the location and functions of Myometrium and Endometrium.
 
7-How does a test cross help to determine the genotype of an individual ?
 
OR
Mention two application of DNA polymorphism.
 
8-What kind of areas are suitable for practicing apiculture ? Write the scientific
name of the variety commonly reared for the purpose.
 
9-Suggest four advanced ex-situ methods to conserve threatened biodiversity.
 
10-Lower BOD of a water bofy helps reappearance of clean-water organisms. Explain.
 
SECTION-C
 
11-“Post-industrializtion, the population of melanised moth increase in England at the expense of white-winged moths.” Provide explanations.
 
12-Why does the ‘insertional inactivation’ method to detect recombinant DNA is preferred to ‘antibiotic resistance’ procedure ?
 
13-Explain the role of the enzyme EcoRI in recombinant DNA technology.
 
14-Draw a labelled diagram of the embryonic stage that gets implanted in the human uterus. State the function of the two parts labelled.
 
15-(a) Draw a labelled sketch of a mature 7-celled, 8-nucleate embryo-sac.
(b) Which one of the cell in an embryo-sac produce endosperperm after double fertilization ?


Please click the link below to download CBSE Class 12 Biology Sample Paper 2018 Set A

How to download CBSE Class 12 Biology Sample Paper 2018 Set A in PDF?

Students can easily download the CBSE Class 12 Biology Sample Paper 2018 Set A from our website to prepare for their upcoming examinations. To score high marks, it is important for Class 12 students to understand the exaact pattern as per which teachers design the question papers. We strongly suggest that you practice these latest sample papers for Biology and solve different types of questions that are expected to come this year. You can downloadin PDF format so that you can practice offline. We also recommend that Class 12 students solve these papers actual exam conditions at home.

Why should you solve CBSE Class 12 Biology Sample Paper 2018 Set A?

Practicing these model papers has several benefits for Class 12 students:

  • New Question Bank: This set has fresh questions for Biology which are different from previous years.
  • Exam Pattern Knowledge: Solving more sets will help you to understand the weightage of each chapter in Class 12 and also the type of questions asked.
  • Identify Weak Areas: Comparing your score in each set to find out topics in Class 12 Biology for which you need hard work.
  • Speed and Accuracy: Attempting MCQ questions and long-form problems for Class 12 Biology makes you faster and better and you will be able to finish your exam on time.

What should you do after solving CBSE Class 12 Biology Sample Paper 2018 Set A?

  1. Check Your Work: Match your answers with the solutions given by our teachers in the Biology Sample Paper PDF.
  2. Learn from Mistakes: Class 12 students should focus on the questions which you solved incorrectly and understand the error.
  3. Revision: If you find a question difficult you shoul refer to NCERT book for Class 12 Biology to understand concepts and then try the question again.
  4. Continuous Practice: Solve multiple sets of Biology sample papers from studiestoday.com to build confidence before the CBSE exams.
Where can I download the PDF for CBSE Class 12 Biology Sample Paper 2018 Set A?

You can download the complete PDF for CBSE Class 12 Biology Sample Paper 2018 Set A for free from StudiesToday.com. Our resources for Class 12 Biology are updated for the latest academic session and follow the official exam pattern.

Are solutions provided for CBSE Class 12 Biology Sample Paper 2018 Set A?

Yes, CBSE Class 12 Biology Sample Paper 2018 Set A comes with detailed, teacher-verified solutions. We have provided step-by-step answers for Biology to help students of Class 12 understand correct methodology and marking scheme.

How can practicing CBSE Class 12 Biology Sample Paper 2018 Set A help in exam preparation?

Practicing this Biology paper helps in time management and identifying important topics. For Class 12, solving mock papers is the best way to gain confidence and reduce exam-day anxiety.

Is the CBSE Class 12 Biology Sample Paper 2018 Set A accessible on mobile and tablets?

Yes, all our study materials for Class 12 Biology are provided in a mobile-friendly PDF format. You can easily download CBSE Class 12 Biology Sample Paper 2018 Set A on your mobile device.