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CLASS XII MOCK TEST QUESTION PAPER SERIES 1 for 2016 ISC

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Sumit Roy
Sri Sri Academy (SSA), Kolkata
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ISC MOCK TEST SERIES 1 FOR THE ISC BIOLOGY 2016 Time: 3 Hours 1. 2. 3. 4 Max Marks - 70 GENERAL INSTRUCTIONS: Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time Answer all questions in part - I and six questions in part - II; choosing two questions from each of the three sections:- Section A ,Section B and Section C. All working including rough work; should be done on the same sheet as on adjacent to the rest of answer. The intended marks for questions or parts questions are given in brackets ( ) Part I (20 Marks) Answer all questions Question 1 (a) Give a brief answer for each of the following:(i) What are Exons and Introns? (ii) Human testes are always located outside the body cavity. Explain why? (iii) Name a commonly used vector (along with its name), used in genetic engineering. (iv) What will happen if the transpiration rate exceeds the amount of water absorbed? (4) (b) State the significant differences between the following:(i) Antibody and Interferon. (ii) Vasa differentia and Vasa efferentia. (iii) Test Cross and Back Cross. (iv) In situ conservation and Ex-situ conservation. (4) (c) State the exact location and the most important function of the following :- (Any four) (i) Bulliform cells. (ii) Kupffer cells. (iii) Tapetum cells. (iv) Sertoli cells. (v) Immunoglobulin (vi) Alpha Lactalbumin (vii) p53 gene (4) (d) Give a scientific term for each of the following:(4) (i) The gene of cancer causing virus responsible for transformation. (ii) Capability of an explants to generate a whole plant (iii) The areas those are extremely rich in species diversity, high endemism and under constant threat. (iv) Specific proteins synthesized by the host in response to the antigen P.T.O. (e) Name the scientists who have contributed the following:-: (i) First invented CT SCAN. (ii) Proposed the Recapitulation theory. (iii) Described Double fertilization in Plants (iv) Theory of Human Population (2) (f) Expand the following: (i) ZIFT (ii) DDT (iii) RUBISCO (iv) MOET (2) Part II (50 Marks) Section A (10 Marks) Answer any two questions. Question 2 (a) Explain briefly the different types of natural selection with the help of graphs. (b) Define the term Gene pool and Genetic Erosion (c) Write two distinctive features of Neanderthal man? (3) (1) (1) Question 3 (a) Archaeopteryx is a connecting link between reptiles and birds. Justify the statement by giving two characteristic features of each group. (b) What are Coacervates and Hardy Wienberg Principle? (c) Give one significant difference between Founder s effect and Bottleneck effect. (3) (1) (1) Question 4 a Explain the basic postulates of Darwinism with an example. What is the objection against it? b Explain briefly the concept of Allopatric and Sympatric speciation. c Give an account of Oparin Haldane theory of Origin of Life. (3) (1) (1) Section B (20 Marks) Answer any two questions. Question 5 (a) Give a graphical representation of Hatch and Slack Pathway (b) Describe the various ways in which pollen tube can enter into the ovule with diagram (c1) Write four anatomical differences between Monocotyledonous and Dicotyledonous leaves OR (c2) Give four significant differences between Cyclic and Non cyclic Photophosphorylation (4) (4) (2) (2) P.T.O. Question 6 (a) Explain the Fujino s concept of opening and closing of stomata by Active transport mechanism (4) (b) Explain the process of spermatogenesis in humans. (4) (c1) Discuss the different types of endosperm development (2) OR (c2) Write short notes on the following: - Practical application of Plasmolysis, Capacitation & Kranz Anatomy Question 7 (a) Give an account of activity of cambium in the secondary growth of the dicot stem (4) (b) Describe briefly the events that occur during the different phases of the menstrual cycle (4) (c) Give four compatible differences between C3 and C4 cycle (2) Section C (20 Marks) Answer any two questions. Question 8 (a) Discuss the structure of E.coli cloning vector pBR322 with the help of neat labelled diagram. State four applications of Recombinant DNA technology (4) (b) Differentiate between the following:(1) Green manure and Biofertilizers. (2) Osmoregulators and Osmoconformers (3) Malignant tumour and Benign tumour (4) T- lymphocytes and B- lymphocytes (4) (c) What is SCP? Give its source and two significance. (2) Question 9 (a) (i) (ii) (b) State two important application each of DNA fingerprinting and HGP Explain the role of stem cells in medical treatment. (4) Mention the cause and most important symptom of the following genetic disorders. Also mention the sex in each case:(i) Down s Syndrome. (ii) Klinefelter Syndrome. (iii) Turner Syndrome. (iv) Erythroblastosis foetalis (4) (c) Define the term Pleiotropism and Restriction enzymes with examples in both cases? (1) (d) What is Artificial insemination? Mention two ways in which it is useful in breeding animals? (1) P.T.O. Question 10 (a) Name the causative agent and the main symptom of each of the following diseases:(1) Ascariasis. (2) Typhoid (3) Swine flu (4) Amoebiasis (4) (b) In humans blue eye colour is recessive to brown eye colour. A brown eyed man has a blue eyed mother (i) What is the genotype of the man and his mother? (ii) What are the possible genotypes of his father? (iii) If the man marries a blue eyed woman, what are the possible genotypes of their offspring. Also calculate the percentage probability for each genotype. (3) (c) Write short notes on the following: - (Any Four) (2) (i) Biofortification. (ii) Central Dogma (iii) Genetic Code (iv) Cryopreservation. (v) Protoplast fusion (d) State the main function of the following:- (Any Two) (1) (i) Gyrase (ii) Lactose in Escherichia coli medium (iii) Rho factor (iv) Ochre (v) Leghaemoglobin Prepared by:Mr. Sumit Roy [Asst. Biology Teacher] (9830431393/9874577160/7044929409) Post Graduate Diploma in Environmental Biotechnology (C .U.) M.Sc (Zoology), Gold Medalist of Vidyasagar University, B.Ed E mail: - sumitroy888@gmail.com sumit@ssa.or g.in

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