CBSE Class 12 Biology Question Papers SA1 2011 (1)

CBSE Class 12 Biology Question Papers SA1 2011 (1).Students can download the last year question papers using the link below.Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

SECTION - A

1. Name the organism in which following asexual reproductive structures are formed -

(a) Conidia (b) Gemmules

2. At what stage of life is oogenesis initiated in a human female ? When does the oocyte complete oogenesis?

3. Mention two events that are inhibited by the intake of oral contraceptive pills to prevent pregnancy in humans.

4. Name two STDs which can be transmitted through contaminated blood.

5. There is a boy with blood group A, whose mother has blood group B. Give the possible genotype (s) and phenotype of the father.

6. Name the RNA polymerase that transcribes tRNA in eukaryotes.

7. Mention the types of evolution that has brought the similarity as seen in potato tuber and sweet potato.

8. Mention the strategy used to increase homozygosity in cattle for desired traits.

Please click the link below to download pdf file of CBSE Class 12 Biology Question Papers SA1 2011 (1).