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CBSE XII Sample / Mock 2017 : BIOLOGY (with Marking Scheme / Solutions)

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Sample Question Paper 2 Class XII (2016-17) Biology (044) Time allowed: 3hrs. Maximum Marks: 70 General Instructions: 1. There are a total of 26 questions and five sections in the question paper. All questions are compulsory. 2. Section A contains question number 1 to 5, Very Short Answer type questions of one mark each. 3. Section B contains question number 6 to 10, Short Answer type I questions of two marks each. 4. Section C contains question number 11 to 22, Short Answer type II questions of three marks each. 5. Section D contains question number 23, Value Based Question of four marks. 6. Section E contains question number 24 to 26, Long Answer type questions of five marks each. 7. There is no overall choice in the question paper, however, an internal choice is provided in one question of two marks, one question of three marks and all three questions of five marks. An examinee is to attempt any one of the questions out of the two given in the question paper with the same question number. Section - A 1. A certain tissue, of a plant, infected with TMV was used to obtain a new plant using tissue culture technique. Identify the technique used and reason out the possibility of obtaining a new healthy plant. 1 2. State a method of cellular defense which works in all eukaryotic organisms. 1 3. In case of an infertile couple, the male partner can inseminate normally but the mobility of sperms is below 40 percent. Judge, which kind of ART is suitable in this situation to form an embryo in the laboratory, without involving a donor? 1 4. PCR requires very high temperature conditions where most of the enzymes get denatured. How was this problem resolved in a PCR? 1 5. If two genes are located far apart from each other on a chromosome, what will be its effect on the frequency of recombination? 1

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