Class 12th Biology Sample Papers CBSE Boards 2009

Biology is one of the toughest subjects which most of the people say. This is the subject which requires lots of cramming to score well in this exam. To crack this subject what all you need to do is study hard and devote as much time to the subject to keep on learning and revising the same topics again and again. This is the only mantra which can let you to score good marks in the subject. Biology is the subject which can make way for medical field in the upcoming future if you are planning or thinking of it. I am providing you with some sample papers which can help you to check out your level and to improve your level in the subject.
All the best and score well to make way for your future.

Download CBSE 2009 Class Xll Biology Sample Papers

• Biology Sample Paper 1
• Biology Sample Paper 2
• Biology Sample Paper 3
• Biology Sample Paper 4
• Biology Sample Paper 5

CBSE Syllabus Class 12 for 2009 : Biology

One Paper Time: 3 Hours Marks : 70

Unit – Marks

1. Sexual reproduction - 12

2. Genetics and evolution -20

3. Biology and human Welfare -12

4. Biotechnology and its applications -12

5. Ecology and environment -14

TOTAL -70

I SEXUAL REPRODUCTION (35 Periods)

Pollination and fertilization in flowering plants. Development of seeds and fruits.
Human reproduction: reproductive system in male and female, menstrual cycle. Production of gametes, fertilization, implantation, ,embryo development, pregnancy and parturation. Reproductive health - birth control, contraception and sexually transmitted diseases.

II GENETICS AND EVOLUTION (45 Periods)

Mendelian inheritance. Chromosome theory of inheritance, deviations from Mendelian ratio (gene interaction- Incomplete dominance, co-dominance, complementary genes, multiple alleles). Sex determination in human beings: XX, XY. Linkage and crossing over. Inheritance pattern of haemophilia and blood groups in human beings. DNA: replication, transcription, translation. Gene expression and regulation. Genome and Human Genome Project. DNA fingerprinting. Evolution: Theories and evidences.

III BIOLOGY AND HUMAN WELFARE (35 Periods)

Animal husbandry.
Basic concepts of immunology, vaccines.
Pathogens, Parasites.
Plant breeding, tissue culture, food production.
Microbes in household food processing, industrial production, sewage treatment and energy generation.
Cancer and AIDS.
Adolescence and drug/alcohol abuse.

IV BIOTECHNOLOGY AND ITS APPLICATIONS (30 Periods)

Recombinant DNA technology.
Applications in Health, Agriculture and Industry
Genetically modified (GM) organisms; biosafety issues.
Insulin and Bt cotton

V ECOLOGY & ENVIRONMENT (35 Periods)

Ecosystems: components, types and energy flow.
Species, population and community.
Ecological adaptations.
Centres of diversity and conservation of biodiversity, National parks and sanctuaries.
Environmental issues.