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Old November 20th, 2017, 05:23 PM
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Default Re: CISCE ISC Specimen Papers

I am providing you the question paper of Specimen of Biology of Class XII of Indian School Certificate Examinations CISCE

CISCE exam Class XII Specimen Biology question paper

Answer all questions in Part I and six questions in Part II, choosing two questions
from each of the three sections A, B and C.

PART I (20 Marks)

Answer all questions.

Question 1
(a) Give a brief answer for each of the following: [4]
(i) What happens if excess fertilizers are added to the soil?
(ii) Why are the annual rings absent in plants growing along the coastal areas?
(iii) What is a Punnett-square used for?
(iv) Malignant tumours are considered dangerous. Why?
(b) Each of the following statements/ questions has four suggested answers. Choose thecorrect option in each case:[4]

1. Gene therapy can be used to correct one of the following:
(i) SCID
(ii) HIV
(iii) Typhoid
(iv) Hepatitis

2. The dark coloured dead wood present in the central region of old trees is called:
(i) Spring wood
(ii) Sap wood
(iii) Duramen
(iv) Alburnum

3. Which of the following statements is correct?
(i) Surgical methods of contraception do not prevent gamete formation.
(ii) In E.T. techniques, embryos are always transferred into the uterus.
(iii) Oral pills are very popular contraceptives among the rural women.
(iv) All STDs are not completely curable.

4. The Hardy Weinberg’s equilibrium is associated with:
(i) Ionic equilibrium.
(ii) Population genetics.
(iii) Osmotic balance.
(iv) None of these.

(c) Give a scientific term for each of the following: [4]
(i) Development of fruit without fertilization.
(ii) The process of mRNA synthesis on a DNA template.
(iii) A plant part excised from its original location and used for initiating a culture.
(iv) The surgical removal of a section of vas deferens.

(d) Expand the following abbreviations: [4]
(i) PKU
(ii) GIFT
(iii) DNA
(iv) GMO

(e) Name the scientists who have contributed to the following: [4]
(i) Principle of Limiting Factor.
(ii) The recapitulation theory.
(iii) Discovered the fossil of Archaeopteryx.
(iv) Described double fertilisation in plants.

CISCE exam Class XII Specimen Biology question paper

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