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CBSE Guess > Papers > Question Papers > Class XII > 2006 > Biology > Compartment Delhi Set -II

BIOLOGY— 2006 (Set II—Compartment Delhi)

General Instructions: See in the Set—I, 2006 (Comptt.) D. B.

Note: Except for the following questions, all the remaining questions have been asked in Set-I, 2006, (Comptt.)

SECTION - A

Q. 3. What is a reflex action? (1)

SECTION - B

Q. 6. Why is abscisic acid considered antagonistic in its effect to that of gibber ellins? Give two reasons. (2)

Q. 7. How are some plants adapted to absorb mineral nutrients from the mineral deficient soil? Explain. (2)

Q. 8. What is the ecological niche of an organism? Why is it believed that no two species can occupy exactly the same niche? (2)

Q.13. What is a portal vein Name one such vein in humans and give its function (2)

SECTION - C

Q. 17. Explain the three steps involved in the treatment of municipal wastewater in Effluent Treatment Plant, prior to its disposal (3)

Q. 22. Construct a flow chart showing the pathway of anaerobic respiration in yeast (fermentation). (3)

Q. 24. Describe the manner how the digested fatty acids, monoglycerides and glycerol are transported to blood from our small intestine. (3)

Q. 27. Explain the dual role of ribulose bisphosphate carboxylase oxygenase (rubisco) in plant metabolism. Mention the conditions required, the substrate and the end product of each reaction. (5)

Or

What is photophosphorylation ? Explain the non-cyclic photophosphorylation.

Q. 28. Describe the changes which the glomerular filtrate undergoes as it passes down the various regions of a nephron in humans to form urine. (5)

Or

  1. Where and how is the cardiac impulse generated in human heart? Explain.
  2. How does this impulse travel to the different chambers
Biology 2006 Question Papers Class XII
Delhi Outside Delhi Compartment Delhi Compartment Outside Delhi
Indian Colleges Set I Indian Colleges Set I Indian Colleges Set I Indian Colleges Set I
Indian Colleges Set II Indian Colleges Set II Indian Colleges Set II Indian Colleges Set II
Indian Colleges Set III Indian Colleges Set III Indian Colleges Set III