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CBSE Class 12 Pre Board 2020 : Biology - Prelim 2 (Delhi Public School (DPS), Jammu)

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DELHI PUBLIC SCHOOL, JAMMU Assignment Pre Board II Session: 2019-20 Class XII Sub: Biology Topics included are: 1. Reproduction in organisms, Sexual reproduction in flowering plants, Human reproduction and Reproductive health. 2. Principles of Inheritance and Variation, Molecular Basis of Inheritance, Evolution. 3. Human Health and Diseases, Strategies for Enhancement in Food Production, Microbes in Human welfare. 4. Biotechnology: Principles and Processes, Biotechnology and its applications. 5. Ecology and Environment Q1. The fermented food of soyabean is (1) Tempeh (2) Tofu (3) Sufu (4) All of these Q2. Read the following four statements (A D) about certain mistakes in two of them : (A) Dough, which is used for making foods such as dosa and idli is fermented by fungi and algae (B) Toddy, a traditional drink of southern India is made by fermenting sap from palms. (C) Large hole in 'Swiss cheese' are due to production of large amount of methane by Propionibacterium sharmanii (D) In our stomach, lactic acid bacteria play very beneficial role in checking disease causing microbes Select the two statements having mistakes (1) Statements (A) & (C) (2) Statements (A) & (B) (3) Statements (B) & (C) (4) Statements (C) & (D) Q3. See the given steps that are related to plant breeding : a. Selection and testing of hybrid b. Selection of parents c. Germplasm collection d. Crossing among selected parents e. Testing and release of new cultivars Select the correct order for these steps (1) b c d e a (2) c b d a e (3) c b a d e (4) a b c d e Q4. Which of the following enzymes has been incorrectly matched with their function? (1) Ligase Molecular glue (2) Endonuclease Chemical scalpel (3) DNA polymerase Joins nucleosides (4) RNA polymerase Joins nucleotides

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