(Biology) CBSE Class 12th Biology Exam Paper, 2004 (Delhi: Set - 2)

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Paper : CBSE Class 12th Biology Exam Paper, 2004 (Delhi: Set - 2)

 

SECTION A

Q. 1. How does saliva act in body defence? 1

 

SECTION - B

Q. 6. What is hydroponics? Give one application of this technique. 2

Q. 9. Where are auxins synthesised in plants? Mention any two of their functions. 2

Q. 10. Differentiate between mutualism and commensalism. 2

Q.13. Name the different types of granulocytes Give the function, of the one which constitutes maximum percentage of the total leucocytes. 2

Q. 14. Which gases cause stratospheric ozone depletion? What is the result of this depletion? 2

Q. 15. Explain briefly how computed tomography (CT) helps the doctors in pinpointing the defects in patient's body 2
Or
Name the cells that produce antibodies. Explain the main function of these coin pounds.

 

SECTION - C

Q. 23. Define inbreeding. What is the danger of inbreeding? 3

 

SECTION - D

Q. 26. Explain the major steps of Glycolysis. Where does this process occur in a cell? 5