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CBSE XII Sample / Mock 2011 : BIOTECHNOLOGY with Answers

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BIO-TECHNOLOGY Time allowed : 3 hours Maximum marks: 70 General Instructions: (i) All questions are compulsory. (ii) There is no overall choice. However, an internal choice has been provided in one question of two marks and two questions of five marks. You have to attempt only one of the choices in such questions. Question paper contains four sections -A, B, C and D. (iii) Question numbers 1 to 5 are very short answer questions, carrying 1 mark each. (iv) Question numbers 6 to 15 are short answer questions, carrying 2 marks each. (v) Question numbers 16 to 25 are also short answer questions, carrying 3 marks each. (vi) Question numbers 26 to 28 are long answer questions, carrying 5 marks each. (vii) Use of calculators is not permitted. However, you may use log tables, if necessary. QUESTION PAPER CODE 99/1 Section - A 1. Give the sequence of the 2 primers (5-nucleotides long) required to amplify the following DNA sequence by PCR : 5 ATGCCTAGGATCATGC 3 1 2. Why is the nutrient medium autoclaved before using it for culturing microbes ? 1 3. Which future vaccine holds promise of bypassing the need to visit the doctor regularly for childhood immunisations ? 1 A soil microorganism produces a novel metabolite in nanomolar concentration (nM). Suggest a way to increase its production in quantities that are economically viable. 1 Why is Golden rice nutritionally superior to normal rice ? 1 4. 5. Section - B 6. 7. Ovalbumin is the major protein of egg white. The chicken ovalbumin gene contains 8 exons separated by 7 introns. Should one use ovalbumin cDNA or genomic DNA to express the protein in E. coli and why ? 2 How can SNPs be used to predict susceptibility to diseases ? 2 209

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Additional Info : CBSE Class XII Board Solved Sample / Mock Question Paper 2011 Biotechnology with Answers
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