BSEH Haryana Board Class 12 Biology Model Paper 2025: The Board of School Education Haryana (BSEH) contributes to the quality and access to school education in the state of Haryana. The Board has released the model papers for various subjects for the students of class 12. The model papers have been released on the official website, bseh.org.in.
Along with the model paper, BSEH has also made available the marking scheme for all the subjects. It is important from the point of examination that students be aware of the marking pattern and the paper structure.
In this article we have provided the HBSE Class 12 Biology sample paper and marking scheme for the 2025 Board examination. The marking scheme also includes the solutions so students can check in case of any doubts.
HBSE Class 12 Biology Question Paper Design 2024-25
1. All questions are compulsory.
2. The question paper has five sections and 35 questions.
3. Section A has 18 questions of mark 1 each; Section B has 7 questions of 2 mark each; Section C has 5 questions of 3 marks each; Section D has 2 case based questions of 4 marks each; Section E has 3 questions of 5 marks each.
4. There is no overall choice. However, internal choices have been provided in some questions. A student has to attempt only one of the alternatives in such questions.
5. Where ever necessary, neat and properly labelled diagrams should be drawn.
HBSE Class 12 Biology Sample Paper 2024-25
Section A
1. The Pistils more than one when fused together are knowns as:
a) Monocarpellary b) Syncarpous c) Apocarpous d) None of the above
Ans. b) Syncarpous
2. The number of primary follicles left in each ovary at puberty are:
a) 20,000-40,000 b) 40,000-60,000 c) 60,000-80,000 d) 80,000-100,000
Ans. c) 60,000-80,000
3. In ZIFT (Zygote Intra Fallopian Transfer) the zygote or early embryos could be transferred into the fallopian tube with up to………blastomeres.
Ans. 8
4. Sickle-cell anaemia is a ………………… trait.
Ans. Autosome linked recessive trait
5. Triplet codon AUG performs dual functions:
a) AUG codes for Methionine, and it also acts as initiator codon.
b) AUG codes for Phenylalanine, and it also acts as initiator codon.
c) AUG codes for Methionine, and it also acts as terminator codon.
d) AUG codes for Phenylalanine, and it also acts as terminator codon
Ans. a) AUG codes for Methionine, and it also act as initiator codon.
6. Write the name of ship on which Charles Darwin went for sea voyage.
Ans. H.M.S. Beagle
7. In RNA uracil is found in place of:
a) Cytosine b) Guanine c) Adenine d) Thymine
Ans. d) Thymine
8. The number of peptide chains found in protein antibodies produced by Blymphocytes is………
Ans. Four
9. Name the widely used diagnostic test for AIDS.
Ans. ELISA (Enzyme Linked Immuno-sorbent Assay).
10. The application of statins produced by yeast Monascus purpureus is:
a) As a clot buster from blood vessels.
b) As a blood cholesterol lowering agent.
c) As an immunosuppressive agent.
d) For removing oily stains.
Ans. b) As a blood cholesterol lowering agent.
11. Who created first recombinant DNA:
a) Stanley Cohen b) Herbert Boyer c) Stanley Cohen and Herbert Boyer d) None of the above.
Ans. c) Stanley Cohen and Herbert Boyer
12. The toxic insecticide produced by some strains of Bacillus thuringiensis harming lepidopterans and dipterans is chemically a:
a) Carbohydrate b) Protein c) Lipid d) Fatty acid
Ans. b) Protein
13. In a pond there were 20 lotus plants last year and through reproduction 8 new plants are added, increasing the current population to 28. The calculated birth rate of offsprings will be:
a) 0.2 b) 0.4 c) 0.8 d) 0.16
Ans. b) 0.4
14. Net primary productivity is:
a) Gross primary productivity minus respiration losses
b) Gross primary productivity plus respiration losses
c) Gross Secondary productivity minus respiration losses
d) Gross Secondary productivity plus respiration losses
Ans. a) Gross primary productivity minus respiration losses.
15. What is the name of the specific place occupied by the organisms in the food chain on the basis of their nutrition source?
Ans. Trophic level
Assertion Reason based questions:
Answer these questions by choosing right option.
(a) Both A and R are true an R is right explanation of A.
(b) Both A and R are true an R is not right explanation of A.
(c) A is true and R is false.
(d) A is false and R is true.
16. Assertion A: Grasshopper is an example of XO type of sex determination.
Reason R: In grasshoppers besides autosomes males have only one X chromosome whereas females have a pair of X chromosomes.
Ans. (a) Both A and R are true an R is right explanation of A.
17. Assertion A: Genetic code is degenerate.
Reason R: Some amino acids are coded by more than one codon.
Ans. (a) Both A and R are true an R is right explanation of A.
18. Assertion A: In earth‟s biodiversity animals constitute 70 percent of all the species recorded. Reason R: Number of fungi species is less than the combined total species of fishes, amphibians, reptiles and mammals.
Ans. (c) A is true and R is false.
Now that you have checked the questions and answers from Section A, download the complete sample paper and marking scheme from the links given below:
Online Test Series for HBSE Class 12 Students
Class 12 students can prepare effectively for the exams with the help of online test series prepared by the subject matter experts. These test series will help students to check their exam preparation. Refer to the link below:
HBSE Class 12 Online Test Series Science
HBSE Class 12 Online Test Series Commerce
Also, check
HBSE Class 12 Syllabus 2024-25 (All Subjects)
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