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ISC Class XII Board Specimen 2017 : Biotechnology Paper 1

4 pages, 51 questions, 6 questions with responses, 6 total responses,

ISC 12th
Indian School Certificate Examination (ISC), New Delhi

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BIOTECHNOLOGY PAPER 1 (THEORY) (Three hours) Maximum Marks: 70 (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time.) ------------------------------------------------------------------------------------------------------------------------Answer Question 1 (compulsory) from Part I and five questions from Part II. The intended marks for questions or parts of questions are given in brackets [ ]. ------------------------------------------------------------------------------------------------------------------------- PART I (20 Marks) Answer all questions. Question 1 (a) Mention any one significant difference between each of the following: (i) Electrophoresis and electroporation. (ii) Glucose and fructose. [5] (iii) Crystallography and centrifugation. (iv) Shuttle vectors and expression vector. (v) Gene and genome. (b) Answer the following questions: [5] (i) What type of plants are obtained by distant hybridization? (ii) What is the role of Eco R1 in genetic engineering? (iii) Why is the amino acid valine said to be optically active? (iv) Who proposed the one gene one enzyme hypothesis? (v) Why was the bacteria E. Coli chosen for genome sequencing projects? ------------------------------------------------------------------------------------------------------------------------- Copyright reserved. 1 ISC SPECIMEN QUESTION PAPER - 2017 (c) Write the full forms of the following: (i) MGD (ii) ddNTP [5] (iii) BAC (iv) STS (v) GM (d) Explain briefly : [5] (i) Single nucleotide polymorphism (ii) Chargaff s law (iii) Palindromic sequences (iv) Codon (v) Microprocessor PART II (50 Marks) Attempt any five questions. Question 2 (a) With reference to the nucleic acids mRNA and DNA, explain: (i) [4] Their physical structures. (ii) The functions they perform in a cell. (b) Mention the steps involved in charging of amino acids for the process of translation. [4] (c) Write any two properties of genetic code. [2] Question 3 (a) Enumerate any four factors affecting the activity of enzymes. [4] (b) Write short notes on: [4] (i) Primary and secondary proteins (ii) Coenzymes (c) What are the building blocks of lipids? [2] ------------------------------------------------------------------------------------------------------------------------- Copyright reserved. 2 ISC SPECIMEN QUESTION PAPER - 2017 Question 4 (a) Explain the following innovations using modern biotechnological tools: (i) [4] Oil eating bacteria. (ii) Recombinant insulin. (b) Name and explain the characteristics of four different types of vectors used in genetic engineering. [4] (c) What is insertional inactivation? [2] Question 5 (a) How are biomolecules separated using the biochemical techniques given below: (i) [4] Partition chromatography (ii) Spectroscopy (b) List the steps involved in each cycle of Polymerase chain reactions. Also state the principle on which the technique is based. [4] (c) Name any two low resolution mapping techniques. [2] Question 6 (a) Explain any three ways by which the laboratory apparatus and instruments can be sterilized. Why is it important to maintain sterile conditions for tissue culture work? [4] (b) Enumerate the steps involved in the regeneration of a single cell to whole plant. [4] (c) Write two points of significance of germplasm conservation? [2] Question 7 (a) What is freeze preservation? Explain any three types of freeze preservation methods. [4] (b) Discuss the following traits that can be developed in crop plants with the help of biotechnology: [4] (i) Seedlessness in fruits (ii) Drought resistance (c) What is the importance of pH during media preparation? [2] ------------------------------------------------------------------------------------------------------------------------- Copyright reserved. 3 ISC SPECIMEN QUESTION PAPER - 2017 Question 8 (a) Write short notes on: (i) [4] Cellular totipotency (ii) Zygotic embryo culture (b) Write a note on different types of sequence analysis programs. [4] (c) List two methods of isolating single cells from plant tissues. [2] Question 9 (a) Mention the significance and applications of bioinformatics. [4] (b) Enumerate the functions of following bioinformatics tools: [4] (i) Taxonomy browser (ii) BLAST (c) Name any four centres or funding agencies which deal with biotechnology in India. [2] ------------------------------------------------------------------------------------------------------------------------- Copyright reserved. 4 ISC SPECIMEN QUESTION PAPER - 2017

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