CBSE Class 12 Biology Sample Papers 2013 Set 16

CBSE Class 12 Biology Sample Papers 2013 (16). 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. Mention the unique flowering phenomenon exhibited by Strobilanthus kunthiana (neelakuranaji). 

2. How does smoking tobacco in human lead to oxygen deficiency in their body? 

3. A garden pea plant (A) produced inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits. 

4. Why is Eichhornia crassipes nicknamed as "Terror of Bengal" ? 

5. Write the location and function of the sertoli cells in humans. 

6. Name the following: 

(a) The semi-dwarf variety of wheat which is high-yielding and disease-resistant. 

(b) Any one inter-specific hybrid mammal. 

7. Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution? 

8. Write what do phytophagous insects feed on. 

SECTION - B 

9. Draw a neat labelled sketch of a replicating fork of DNA. 

10. Where is sporopollenin present in plants? State its significance with reference to its chemical nature. 

11. (a) Highlight the role of thymus as a lymphoid organ. 

(b) Name the cells that are released from the above mentioned gland. Mention how they help in immunity. 

12. Explain the work carried out by Cohen and Boyer that contributed immensely in biotechnology.

Please click the link below to download pdf file of CBSE Class 12 Biology Sample Papers 2013 (16).