CBSE Class 12 Biology Question Paper 2007 (2)

 CBSE Class 12 Biology Question Paper 2007 (2). 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. What is diphyodont ? 

2. Name a plant hormone that controls apical dominance and a plant hormone that reduces it. 

3. Name the dominant producers in a deep aquatic ecosystem. What other name could you give to a primary consumer ? 

4. Expand EEG. Give one use of this technique.EEG. 

5. What are the two kinds of forces involving water molecules that allow water to travel upward in plants ? 

SECTION-B

 6. What is chemosynthesis ? Name a chemosynthetic organism. 

OR

 In what form do plants absorb zinc from the soil ? List any two zinc deficiency symptoms in plants.

 7. What is pregnancy hormone ? Why is it so called ? Name two sources of this hormone in a human female.  

8. What does the term genetic diversity refer to?What is the significance of large genetic diversity in a population? 

9. Name and explain the type of barrier of innate immunity where some cells release interferons when infected. 

10. Why is conversion of pyruvic acid to acetyl CoA called oxidative decarboxylation ? Where does it occur in a cell? 

Please click the link below to download pdf file of CBSE Class 12 Biology Question Paper 2007 (2).