BSEB / Bihar Board 12th Exam Sample Paper Biology


Sample papers


 Bihar School Examination Board (BSEB)

SAMPLE PAPER / MODEL TEST PAPER

SUBJECT – BIOLOGY

BSEB SENIOR SECONDARY EXAM 2011




Section – 1 (Objective type)

  1. In the following questions Nos. 1 to 10 four alternatives are given to which, there is only one correct answer. Choose the correct answer and mark it in the answer – sheet:
  1. Entomophily is the pollination by

(a) Birds                                     (b) Bats

(c) Wind                                   (d) Insects

2. Copper  – T prevents

(a) Fertilization                             (b) Ovulation

(c) Implantation of embryo in uterus wall

(d) Blocking reproductive duct

3. An exception of Mendel’s law is

(a) Dominance                               (b) Purity of gamete

(c) Linkage                                     (d) Independent assortment

4. Which of the following is a sexually transmitted disease?

(a) Typhoid                                         (b) Cholera

(c) Malaria                                         (d) Syphilis

5. Pyrimidines Present in RNA are

(a) cytosine and Thymine                  (b) Adenine and Guanine

(c) cytosine and Uracil                       (d) Thymine and Uracil

6. Tripe antigen vaccine is not used for

(a)  Diphtheria                                   (b) Pertussis

(C) Typhoid                                         (d) Tetanus

7. PCR method is useful for

(a) DNA synthesis                              (b) Protein synthesis

(c) Amino acid synthesis                    (d) DNA amplification

8. Which of the following is not a greenhouse gas?

(a) Methane                                       (b) Chlorofluorocarbon

(C) CO2                                           (d) Nitrogen

9. Kanha National Park is famous for

(a) Birds                                                (b) rhinoceros

(c) Tigers                                                (d) Crocodiles

10. The number of linkage groups in a cell having 2n = 14 is

(a) 5            (b) 10                (c) 7               (d) 14

11. Consider the following statement:

Statement I: Vasectomy is a device for birth control.

Statement II: It is a surgical method for birth control of these statements I.

(a)   Both the statements are true and Statement II is the correct explanation Statements I.

(b)  Both the statement are true, but Statement II is not the correct explanation Statements I.

(c)   Statement I is true, but Statement II is false.

(d)   Statement I is false, but Statement II is true.

12. Consider the following statements:

Statement I: Green plants are known as producer.

Statement II: They convert light energy into chemical energy.

Of these statements:

(a) Both the statements are true and Statement II is the correct explanation Statements I.

(b) Both the statement are true, but Statement II is not the correct explanation Statements I.

(c) Statement I is true, but Statement II is false.

(d)  Statement I is false, but Statement II is true.

13. Consider the following statements:

Statement I: Entomophily is a type of cross pollination.

Statement II: It takes place with the help of wind.

Of these statements:

(a) Both the statements are true and Statement II is the correct explanation Statements I.

(b) Both the statement are true, but Statement II is not the correct explanation Statements I.

(c) Statement I is true, but Statement II is false.

(d)  Statement I is false, but Statement II is true.

14. Consider the following statements:

Statement I: Bt toxin is produced by a bacterium called Bacillus thringiensis.

Statement II: Bacillus thuringinesis produces carbohydrate that helps to kill certain insects.

Of these statements:

(a) Both the statements are true and Statement II is the correct explanation Statements I.

(b) Both the statement are true, but Statement II is not the correct explanation Statements I.

(c) Statement I is true, but Statement II is false.

(d)  Statement I is false, but Statement II is true

15. Consider the following statements:

Statement I: Penicillin was firstly discovered by Louis Pasteur.

Statement II: penicillin is extracted from a fungus.

Of these statements:

(a) Both the statements are true and Statement II is the correct explanation Statements I.

(b) Both the statement are true, but Statement II is not the correct explanation Statements I.

(c) Statement I is true, but Statement II is false.

(d)  Statement I is false, but Statement II is true

III In the following Questions nos. 16 to 18 has one correct answer among the four alternatives. Choose the correct answer and mark it in the answer sheet.

16. Which among the following is not a viral disease?

(a) Mumps            (b) Influenza            (c) Diphtheria             (d) Measles

17. Which one of the following is not included in animal husbandry?

(a) Bee keeping                                      (b) Poultry farming

(c) Fish farming                                    (d) Organic farming

18. Who among the following is not associated with microbiology?

(a) Louis Pasteur                                    (b) J.D. Watson

(c) Stephan Hales                                    (d) Robert Koch

IV. In the following questions Nos. 19 to 22, there are two columns. Columns I contains 4 questions. You have to match the correct options of these questions as (A), (B), (C), and (D) from Column II:

Column I                                          Column II

19. Nitrogen Fixation                        (a) Environment day

20. Insulin                                           (b) Alexander Fleming

21. 5th June                                          (c) Pancreas

22. Antibiotic                                      (d) Rhizobium

V. For the following Question Nos. 23 to 25 a passage is given. Read carefully the passage and select the correct answer out of given four options.

Some of us are sensitive to some particles in the environment. The exaggerated response of the immune system to certain antigens present in the environment called allergy. The substances to which such an immune response is produced are called allergens. The antibodies produced to these are of IgE type. Common examples of allergens are mites in dust, pollen, animal dander etc. Allergy is due to release of chemicals like histamine and serotonin from the mast cells. Symptoms of allergic reactions include sneezing, water eyes, running nose and difficulty in breathing. Modern day life has resulted in lowering of immunity and more sensitivity to allergens.

23. The substances to which an immune response is produced are called

(a) Allergens                                                          (b) Vaccines

(C) Antibodies                                                       (d) Antigens

24. The antibodies produced in allege are of which type?

(a) IgA                                      (b) IgE

(c) IgM                                         (d) IgG

25. Chemical released due to allergy are

(a) histamine                               (b) Serotonin

(c) Both (A) & (B)                       (d) None of these

Short Answer type Questions

  1. What is the function of Corpus lutetium?
  2. Write two symptoms of AIDS
  3. Write down the four stage involved in crossing over.
  4. Distinguish between transcription and translation.
  5. What do you know about Bhopal gas tragedy?
  6. What do you mean by organic farming?
  7. Explain briefly how an XXY individual is produced in humans.
  8. What is amniocentesis?
  9. What do you mean by the term ‘Pathogen’?
  10. Name few antibiotics obtained from bacteria.
  11. What are the effects of nicotine?

Long answer type Question

12. Describe all the factors of an ecosystem

13. What is genetic engineering? How can it be helpful for human welfare?

14.Write a short essay on reproductive health.

Or, describe the dihybrid cross as explained by Mendel.

15. Prove with two evidences that DNA is a genetic material.





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