(i) There are a total of 26 questions and five sections in the question paper, All questions are compulsory.
(ii) Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.
(iii) Section B contains question number 6 to 10, Short Answer type I questions of two marks each.
(iv) Section C contains question number 11 to 22, Short Answer type II questions of three marks each.
(v) Section D contains question number 23, Value Based Question of four marks.
(vi) Section E contains question number 24 to 26, Long Answer type questions of five marks each.
(vii) 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.
- Q1VIEW SOLUTION
- Q2VIEW SOLUTION
- Q3VIEW SOLUTION
- Q4VIEW SOLUTION
- Q5VIEW SOLUTION
- Q6VIEW SOLUTION
- Q7VIEW SOLUTION
- Q8VIEW SOLUTION
Differentiate between outbreeding and outcrossing.
ORBottled fruit juices are clearer as compared to those made at home. Explain. VIEW SOLUTION
- Q10VIEW SOLUTION
- Q11VIEW SOLUTION
- Q12VIEW SOLUTION
- Q13VIEW SOLUTION
(a) Name the kind of diseases/disorders that are likely to occur in humans ifVIEW SOLUTION
(i) mutation in the gene that codes for an enzyme phenyl alanine hydrolase occurs,
(ii) there is an extra copy of chromosome 21,
(iii) the karyotype is XXY.
(b) Mention any one symptom of the diseases/disorders named above.
- Q15VIEW SOLUTION
- Q16VIEW SOLUTION
- Q17VIEW SOLUTION
(a) Construct a pyramid of numbers by taking suitable examples for each trophic level in an ecosystem.VIEW SOLUTION
(b) Explain why a progressive decline is seen in the population size from the first to the fourth trophic level in the above pyramid.
- Q19VIEW SOLUTION
- Q20VIEW SOLUTION
Many copies of a specific gene of interest are required to study the detailed sequencing of bases in it. Name and explain the process that can help in developing large number of copies of this gene of interest.VIEW SOLUTION
Prepare a flow chart in formation of recombinant DNA by the action of restriction endonuclease enzyme EcoRI.
ORName and explain the technique used for separating DNA fragments and making them available for biotechnology experiments. VIEW SOLUTION
You have attended a birthday party hosted by one of your classmates. You found some guests at the party sitting in a corner making a lot of noise and consuming 'something'. After a while one of the boys from the group started screaming, behaving abnormally and sweating profusely. On enquiry you found that the group members were taking drugs.
(a) Would you inform your parents/school authorities ? Yes/No. Give reasons in support of your answer.
(b) Prepare a note to be circulated amongst the schoolmates about the sources and dangers of any two drugs.
(c) Write any two ways that you will suggest to your school principal so as to promote awareness amongst the youth against the use of these drugs.VIEW SOLUTION
(a) State and explain the law of dominance as proposed by Mendel.
(b) How would phenotypes of monohybrid F1 and F2 progeny showing incomplete dominance in Snapdragon and co-dominance in human blood group be different from Mendelian monohybrid F1 and F2 progeny? Explain.
Explain the process of transcription in Eukaryotes.
Under polio prevention programme, infants in India were given polio vaccines on a large scale at regular intervals to eradicate polio from the country.
(a) What is a vaccine? Explain how does it impart immunity to the child against the disease.
(b) With the help of an example each, differentiate between active and passive immunity.
What are biofertilizers? Describe their role in agriculture. Why are they preferred to chemical fertilizers? VIEW SOLUTION
(a) Explain the events after pollination leading to the formation of a seed in angiosperms.
(b) Mention the ploidy levels of the cells of different parts of an albuminous seed.
Explain the process of fertilisation and implantation in humans. VIEW SOLUTION
Board Papers 2014, Board Paper Solutions 2014, Sample Papers for CBSE Board, CBSE Boards Previous Years Question Paper, Board Exam Solutions 2014, Board Exams Solutions Maths, Board Exams Solutions English, Board Exams Solutions Hindi, Board Exams Solutions Physics, Board Exams Solutions Chemistry, Board Exams Solutions Biology, Board Exams Solutions Economics, Board Exams Solutions Business Studies, Maths Board Papers Solutions, Science Board Paper Solutions, Economics Board Paper Solutions, English Board Papers Solutions, Physics Board Paper Solutions, Chemistry Board Paper Solutions, Hindi Board Paper Solutions, Political Science Board Paper Solutions, Answers of Previous Year Board Papers, Delhi Board Paper Solutions, All India Board Papers Solutions, Abroad/Foreign Board Paper Solutions, cbse class 12 board papers, Cbse board papers with solutions, CBSE solved Board Papers, ssc board papers.