CBSE sample paper for Class 12 Biology board exam 2017 is available for download in PDF format. This sample paper is very important for Class 12 Biology board exam 2017 is scheduled to be held on 5th April 2017.
About CBSE Sample Paper for Class 12th Biology
This paper is developed by experienced teachers of a reputed CBSE School. The questions of this paper are from the complete CBSE syllabus of Class 12 Biology.
This paper is also based on latest examination pattern and all the questions of this paper are important for coming CBSE Class 12 Biology board exam 2017. This 70 marks paper is to be attempted within 3 hours.
General instructions to solve this paper
Time: 3 hours Maximum Marks: 80
All questions are compulsory.
This question paper consists of four Sections A, B, C and D. Section A contains 5 questions of one mark each, Section B is of 5 questions of two marks each, Section C is of 12 questions of three marks each and 1 question of four marks and Section D is of one question of 4 marks & section E is of three questions of five marks each.
There is no overall choice. However, an internal choice has been provided in one question of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A student has to attempt only one of the alternatives in such questions.
Wherever necessary, the diagrams drawn should be neat and properly labelled.
Some randomly selected questions from this sample paper
Q. Which group of organisms, regulators or conformers, can show maximum functional efficiency regardless of the existing weather conditions why?
Q. Name a deadly disease that is completely eradicated from the world. How was it made possible?
Q. The Government of India wants to improve the ‘blue revolution’ programme. What does it aim for?
Q. Name the type of pollination that is both genetically & functionally crossing. Which group of flowers will never undergo this type of pollination?
Q. In which of following species- crow, parrots && tortoise does speciation occur at the fastest rate? Why?
Q. Two people A &B, developed water borne diseases. A showed sustained high fever & loss of appetite whereas B produced stools with excess mucous & blood clots. Identify the diseases of A & B. Mention the target organs of the pathogens.
Q. Give reasons for the following:
(i) Curd is nutritionally better than milk.
(ii) Larger holes are observed in Swiss cheese.
(iii) Alcoholic content in whisky is more than beer, although both are made using malted barley & yeast.
(iv) Nucleo-polyhedroviruses can be used effectively in ecologically fragile areas.
Q. How do the following help in cancer treatment?
(a) alpha interferon
Q. (a) Differentiate b/w zoospore & zygote.
(b) Which parts of flower develop into Perisperm & Pericarp?