Bihar Board Model Papers 2025 PDF: The Bihar School Examination Board (BSEB) is a prominent state education board responsible for conducting the class 10 and class 12 exams. To assist students in preparing for their exams, the board has released model papers that reflect the latest exam pattern and format. These papers can be easily downloaded from this article. This article provides a model paper for Bihar Board Class 12 Biology. Additionally, it includes important exam dates to help you plan your studies effectively.
Bihar Board 12th Biology Model Papers 2024-25
Here is the Bihar Board Biology model paper. These model papers are provided for the inter students who will sit for board exams this year. Click on the link to see and download the Biology sample papers.
Section - A
1. Which of the following is the symbol for mating?
(A) (B)
(C) (D)
2. Which of the following is not a chromosomal disorder?
(A) Down’s syndrome (B) Klinefelter’s syndrome
(C) Turner’s syndrome (D) Phenyl ketonuria
3. In which of the following females heterogamety is found?
(A) Humans (B) Birds
(C) Honey bees (D) Cat
4. The trait which is expressed in heterozygous plants is known as …….
(A) Dominant (B) Recessive
(C) Codominant (D) Partially dominant
5. How many types of genotypes are there for ABO blood groups?
(A) 3 (B) 2
(C) 6 (D) 8
6. Which of the following scientists prepared recombination map?
(A) Mendel (B) Sturtevant
(C) Sutton and Boveri (D) Morgan
7. Which laws of inheritance were propounded on basis of monohybrid?
1. Law of Dominance
2. Law of Segregation
3. Law of independent assortment.
(A) Only 1 (B) Only 2
(C) 1 and 2 (D) 1, 2 and 3
8. Which pentose sugar is present in RNA?
(A) Ribose (B) Deoxyribose
(C) Xylose (D) Ribulose
9. Due to which of the following reasons there is approximately equal distance maintained between two polynucleotide strands of DNA?
(A) Backbone of each polynucleotide chain is constituted by phosphate sugar.
(B) Both polynucleotide strands have antiparallel polarity.
(C) The bases in the two strands are paired through hydrogen bonds forming base pairs.
(D) In DNA purine comes opposite to pyrimidine.
10. Which of the followings is not the reason for stability of DNA?
(A) Both strands of DNA are complementary to each other.
(B) Repair is possible in DNA.
(C) In DNA every nucleotide residue has 2’-hydroxyl group in the pentose sugar.
(D) Thymine is present in place of uracil in DNA.
11. The process of evolution of different species in a given geographical area starting from a point and radiating to other geographical areas is known as…..
(A) Speciation (B) Natural selection
(C) Adaptive radiation (D) Gene flow
12. Which of the following statements is false about the origin of life?
(A) According to Oparin and Haldane the first form of life would have come from pre-existing non-living organic molecules
(B) Free oxygen was not present in atmosphere at the time of origin of life.
(C) If is supposed that earth was formed about 4.5 billion years back.
(D) In his experiment, Miller used oxygen, methane, hydrogen, ammonia and electric discharge at 800°C temperature in a closed flask.
13. The DNA finger printing technique was initially developed by who among the following?
(A) Alec Jeffreys (B) Lalji Singh
(C) Watson and Crick (D) Crick
14. At which of the following sites the repressor protein binds to lac operon?
(A) i-gene (B) Operator region
(C) Promoter (D) y-gene
15. Who among the following confirmed penicillin as a powerful and effective antibiotic?
(A) Ernest chain and Howard Florey
(B) Alexander Fleming
(C) Waksman
(D) Babes
16. Which of the following produces citric acid?
(A) Acetobacter aceti (B) Aspergillus niger
(C) Lactobacillus (D) Saccharomyces cerevisiae
17. Which of the following statements is incorrect about streptokinase?
(A) It is used as clot buster.
(B) It functions as an immunosuppressant.
(C) It is produced by streptococcus.
(D) It is an enzyme.
18. Which of the following statements is incorrect about Trichoderma?
(A) It is a free living fungus.
(B) It is a free living bacterium.
(C) It is effective biocontrol agent of several plant pathogen.
(D) Usually it is found in the root ecosystem.
19. Which of the following fungi terms mycorrhiza?
(A) Glomus (B) Trichoderma
(C) Yeast (D) Penicillium
20. Who discovered blood circulation?
(A) Hippocrates (B) William Harvey
(C) Landsteiner (D) Einthoven
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To download this complete set of Chemistry questions with and get more diverse options, click on the link below:
Bihar Board 12th Biology Model Papers Download PDF
Bihar Board Class 12 Exam Dates 2025
The Bihar School Examination Board (BSEB) has announced the Class 12 Exam Dates for 2025. The exams are set to begin on February 1, 2025 and will end on February 15, 2025. Students can check the official schedule on the BSEB website or at Jagran Josh and start their preparations accordingly.
IMPORTANT TOPICS SUBJECT-WISE | ||
Physics | Chemistry | Mathematics |
Biology | ||
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