CBSE Sample Papers for Class 12 Biology

Latest CBSE Sample Papers for Class 12 Biology 2019-2020 in PDF form free download. NCERT Books and Text Book Solutions, Previous year question papers 2018, 2017, 2016, 2015 and others, sample papers for practice.

Solved papers, All India (Delhi outside), Delhi and Foreign region set 1, set 2 and set 3 papers with their marking scheme and solutions. Main CBSE exams and compartment question papers with marking scheme scheme. Important questions from past 10 years papers and sample papers according to the latest CBSE Curriculum 2019-20, will be uploaded in the NCERT Solution’s section of each subjects.




CBSE Sample Papers for Class 12 Biology

Class:12
Subject:Biology
Contents:CBSE Sample Papers

CBSE Sample Papers for Class 12 Biology in PDF

Previous years CBSE board questions of main exam and compartment exam including all sets of papers, set 1, 2, and 3. Download papers for better preparation of your exam. All the papers are based on latest NCERT Books and following the current CBSE Syllabus.



CBSE Sample Papers for Class 12 Biology




CBSE Board Exam Papers – 2018
CBSE Board Exam Papers – 2017


CBSE Board Exam Papers – 2016

CBSE Board Exam Papers – 2016 Main Exams

CBSE Board Exam Papers – 2015 Compartment Exams

CBSE Board Exam Papers – 2015 & 2014

CBSE Board Exam Papers – 2015 Main Exams

CBSE Board Exam Papers – 2014 Compartment Exams

CBSE Board Exam Papers – 2014 Main Exams




Important Questions from 2018 Board Papers – Biology

1. Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
(a) Recommend two microbes that can enrich the soil with nitrogen.
(b) Why do leguminous crops not require such enrichment of the soil ?
2. Medically it is advised to all young mothers that breastfeeding is the best for their newborn babies. Do you agree ? Give reasons in support of your answer.
3. (a) How has the development of bioreactor helped in biotechnology ?
(b) Name the most commonly used bioreactor and describe its working.
4. (a) ‘‘India has greater ecosystem diversity than Norway.’’ Do you agree with the statement ? Give reasons in support of your answer.
(b) Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organisation.
5. Explain the effect on the characteristics of a river when urban sewage is discharged into it.
6. Looking at the deteriorating air quality because of air pollution in many cities of the country, the citizens are very much worried and concerned about their health. The doctors have declared health emergency in the cities where the air quality is very severely poor.
(a) Mention any two major causes of air pollution.
(b) Write any two harmful effects of air pollution to plants and humans.



Important Questions from 2017 Board Papers – Biology

1. A mature embryo-sac in a flowering plant may possess 7-cells, but 8-nuclei. Explain with the help of a diagram only.
2. During a medical investigation, an infant was found to possess an extra chromosome 21. Describe the symptoms the child is likely to develop later in the life.
3. A number of passengers were severely burnt beyond recognition during a train accident. Name and describe a modern technique that can help hand over the dead to their relatives.
4. What precaution(s) would you recommend to a patient requiring repeated blood transfusion? 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.



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