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xii biology sample paper- 2

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Krishna Patil
K. V. Pendharkar College, Dombivli
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PRANJAL GROUP TUITIONS XI & XII SCI. / JEE (Main) / MH-CET / AIPMT 2014-15 XII SCI: BIOLOGY PRELIMINARY EXAM-2 Time: 3 Hrs. Max Marks: 70 Note: i. ii. iii. iv. v. vi. Answers to Section-I and Section-II should be written in Two Separate answer books. Questions from Section-I attempted in the answer book of Section-II and vice-versa will not be assessed / not given any credit. All questions are compulsory. Draw neat and labelled diagram wherever necessary. Figures to the right indicate full marks. Answer to every new question must begin on a new page. SECTION- I Q.1 Select and write the most appropriate answer from the given alternatives [7] for each sub-question. i) The first transposons were discovered in _____. a) corn ii) b) wheat c) rice d) yeast The antibiotic chloromycetin is obtained from _____. a) Streptomyces erythreus c) Streptomyces venezuelae iii) b) Penicillium d) Streptomyces griseus Formation of seedless fruit is called as _____. a) Gymnocarpy c) Angiocarpy iv) b) Apocarpy d) Parthenocarpy How many NADPH2 molecules are required to produce one glucose molecule? a) 8 v) b) 10 c) 12 d) 14 An ability of plant cell by virtue of which it can generate whole plant under suitable conditions is called _____. a) micropropagation c) somatic hybridization vi) b) totipotency d) organogenesis In Pisum sativum which of the following traits is dominant? a) White flowers b) Green seeds c) Yellow pods d) Inflated pods vii) Pyramid of energy is always _____. a) inverted c) spindle-shaped Q.2 A) b) upright d) cup-shaped Answer in One sentence each. [6] i) Why is grafting not possible in monocots? ii) What is the genotype of a true breeding tall and true breeding dwarf pea plant? 2014-15 XI & XII SCI. / JEE (Main) / MH-CET / AIPMT PRANJAL GROUP TUITIONS 1

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