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CBSE Class 12 Biology Question Paper 2017

Apr 5, 2017 15:30 IST

    Download CBSE Board Exam 2017: Class 12 Biology Question Paper

    CBSE board exam 2017 for class 12 Biology was held today on 5 April 2017. With this article, students can download the complete CBSE Class 12 Biology 2017 board exam question paper in PDF format. With this paper, students can easily understand the level of questions which are CBSE Class 12 Biology board exam 2017.

    About CBSE Class 12 Biology 2017 Board Exam Paper

    Total 31 questions are present in this paper. These questions are divided into 5 sections i.e., Section A, B, C, D and E. Out of 31 questions, only 26 questions need to be attempted. There is no overall choice in the question paper. However, internal choices are present in some question.

    Get complete CBSE Class 12 Biology Board Exam 2017 Question Paper Analysis

    General Instructions given in the paper

    Time allowed: 3hours                                                                                                                Maximum Marks: 70

    There are a total of 26 questions and five sections in the question paper.

    All questions are compulsory.

    Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.

    Section B contains question number 6 to 10, Short Answer type I questions of two marks each.

    Section C contains question number 11 to 22, Short Answer type II questions of three marks each.

    Section D contains question number 23, Value Based Question of four marks.

    Section E contains question number 24 to 26, Long Answer type questions of five marks each.

    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.

    Some randomly selected questions from CBSE Class 12 Biology Board Exam 2017 Question Paper

    Q. Our government has intentionally imposed strict conditions for M.T.P. in our country. Justify giving a reason.

    Q. State the fate of a pair of autosomes during gamete formation.

    Q. What at role does an individual organism play as per Darwin' theory of natural selection?

    Q. In an agricultural field there is a prevalence of the fallowing organism and crop diseases which are affecting the crop yield badly:

    (a)White rust

    (b) Leaf and stripe rust

    (c) Balck rot

    (d) Jassids

    Q. How does the application of the fungal genus, Glomus, to the agricultural farm increase the farm output?

    Q. Plenty of algal bloom is observed in a pond in your locality.

    (a) Write what has caused this bloom and how does it affect the quality of water.

    (b) Suggest a preventive measure.

    Q. (a) List the three stages the annuals and biennial angiosperms have, to pass through  during their life cycle.

     (b) List and describe any two vegetative propagules in flowering plants.

    Q. Draw a labelled diagrammatic sectional view of a human seminiferous tubule.

    Q. During a medical investigation, an infant was found to possess an chromosome 21. Describe the symptoms the child is likely to develop later in the life.

    Q. A number of passengers were severely burnt beyond recognition during a try n accident. Name and describe a modern technique that can help hand over the dead to their relatives.

    Q. (a) What precaution(s) would you recommend to a patient requiring repeated blood transfusion?

    (b) If the advise is not followed by the patient, there is an apprehension that the patient might contract a disease that would destroy the immune system of his/her body. Explain with the help of schematic diagram only how the immune system would get affected and destroyed.

    Q. (a) What is inbreeding depression ? (b) Explain the importance of "selection" during inbreeding in cattle

    Q. p2 + 2 pq + q2 = 1. Explain this algebraic equation on the basis of Hardy Weinberg’s principle.

    Q. Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident’s Welfare Association of your locality organized an awareness programme entitled “Bury not burn”. They invited you, being a biology student to participate.
    (a) How would you justify your arguments that protote burying and discourage burning? (Give two reasons)
    (b) With the help of flow charts, one for each practice depict the chain of events that follow.

    Download CBSE Board Exam 2017 Class 12 Biology Question Paper

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