Himachal Pradesh Class 12th Biology Question Paper And Answer Key With Exam Analysis 2025: PDF Download

Himachal Pradesh Class 12th Biology Question Paper And Answer Key 2025: The Himachal Pradesh Board of School Education (HPBOSE) conducted the Class 12th Biology exam today for the academic year 2024-25. The test took place during the morning shift. The 12th Biology question paper and answer key are now available to exam takers in PDF format. Before the official results are out, this will assist students in evaluating their performance and estimating their scores.

HPBOSE 12th Biology Exam Analysis 2025

The exam is over and experts have provided a detailed analysis of the Biology paper, covering aspects like:

Students Reaction: 

• Many students struggle to complete their task within the allotted time.
• Students usually experience a mix of relief, tension, and excitement following an exam as they discuss their responses with their colleagues and await the results.

Teachers Reaction:

• In order to make sure that all of the main themes were fairly represented, teachers examined whether the exam questions sufficiently covered the syllabus.
• Instructors frequently evaluate if the exam followed the guidelines.

HPBOSE Class 12th Biology Question Paper 2025 – Overview

HPBOSE CLASS 12 Biology Exam Pattern 

According to the analysis of the model papers available on the HPBOSE website for the Class 12 HP Board Biology Examination, the following is the exam pattern:

HP Board Class 12th Biology General Guidelines

1. All questions are compulsory.
2. The question paper consists of four sections: A, B, C, and D.
3. Section A contains 12 multiple-choice questions of 1 mark each.
4. Section B contains 10 very short answer questions of 2 marks each.
5. Section C contains 6 short answer questions of 3 marks each.
6. Section D contains 2 long answer questions of 5 marks each.
7. Draw neat and labelled diagrams wherever necessary. 

HPBOSE Class 12th Biology: Question Paper 2025

Students can check the class 12th Question Paper Biology exam.

HPBOSE Class 12th Biology: Question Paper 2025 Download PDF

HPBOSE Class 12th Biology: Answer Key 2025

Now that the paper is over, students might be waiting for the answer key. The answer key helps the students to estimate their total score. Students can check the link to the answer key. 

SECTION A (Multiple Choice Questions)

1. The disease common cold is caused by:

   • (a) Rhinoviruses 
   • (b) Streptococcus Pneumonia
   • (c) Salmonella typhimurium
   • (d) Plasmodium vivax

   Answer: (a) Rhinoviruses

2. Acetic acid is produced by:

   • (a) Lactobacillus 
   • (b) Aspergillus niger

   Answer: (a) Lactobacillus

3. Isolation of DNA from plant cells involves the use of which enzyme?
   • (a) Ligase
   • (b) Chitinase
   • (c) Helicase
   • (d) Cellulase 

   Answer: (d) Cellulase

4. Which of the following peptide chains is not present in mature insulin?

   • (a) A
   • (b) B
   • (c) C 
   • (d) None of the above

   Answer: (c) C

5. The interaction where one species is benefited and the other is neither benefited nor harmed is called:

   • (a) Commensalism 
   • (b) Mutualism
   • (c) Amensalism
   • (d) Competition

   Answer: (a) Commensalism

6. Government of India legalized MTP (Medical Termination of Pregnancy) in:

   • (a) 1998
   • (b) 1971 
   • (c) 2001
   • (d) 2008

   Answer: (b) 1971

7. The inner wall of a pollen grain is made of:

   • (a) Sporopollenin 
   • (b) Cellulose and Pectin
   • (c) Lignin and Cellulose
   • (d) Pectocellulose

   Answer: (a) Sporopollenin

8. The second trophic level in a lake ecosystem is:

   • (a) Zooplankton 
   • (b) Phytoplankton
   • (c) Benthos
   • (d) Fishes

   Answer: (a) Zooplankton

9. • Mycorrhiza is a mutualistic symbiotic association between fungi and plant roots.
   • Fungi provide minerals and water to plants.
   • Plants provide organic nutrients to fungi.
   • This relationship enhances plant growth and helps in better nutrient absorption.

     Pleiotropic genes produce:

     • (a) Single phenotype
     • (b) Multiple phenotypes 

     Answer: (b) Multiple phenotypes

     14. Given below is a view of a mature Embryo Sac:

     (i) Name A, B, and C parts.

     • A: Egg cell
     • B: Synergids
     • C: Antipodal cells

     (ii) What is the function of Part C?

     • Antipodal cells help in nourishing the developing embryo sac.

     15. Name the causative agent of the following diseases:
     (i) Elephantiasis – Wuchereria bancrofti (a parasitic filarial worm)
     (ii) Amoebiasis – Entamoeba histolytica
     (iii) Pneumonia – Streptococcus pneumoniae or Haemophilus influenzae
     (iv) Malaria – Plasmodium species (P. vivax, P. falciparum, P. malariae)

     16. OR
     What is Immunity? Define its types.

     • Immunity is the ability of the body to resist harmful microorganisms or toxins by producing antibodies or sensitized white blood cells.
     • Types of Immunity:
       1. Innate Immunity – The natural defense system present since birth.
       2. Acquired Immunity – Immunity developed during a lifetime through exposure to diseases or vaccines.

     Also Check:

• HP Board Syllabus Class 10
• HP Board Class 10  Model Paper 2024-25