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

BIOLOGY— 2006 (Set III—Compartment Delhi)

General Instructions: See in the Set—I, 2006 comptt.

Note: Except for the following questions, all the remaining questions have been asked in Set-I & Set—II, 2006

SECTION - A

Q. 3. Name the two main components of life-supportive capacity of the environment. (1)

SECTION - B

Q. 9. Write one structural and one functional difference between Chlorophyll - a and Chlorophyll-b. (2)

Q.10. What kind of nutrition is referred to, as is found in the case of Escherichia corresponding in the human intestines Why is it called so ‘ (2)

Q. 14. Name the kinds of organisms which constitute the pioneer community of xerarch and hydrarch respectively. (2)

Q. 15. List any four factors which may lead to loss of biodiversity. (2)

SECTION - C

Q. 18. Explain the synthesis of amino acids by the reductive amination process in plants. (3)

Q. 25. Mention any six possible characteristics of a species which make it susceptible to extinction. (3)

SECTION - D

Q. 26. What is a cardiac cycle? Explain the pumping action of heart during a cardiac cycle. (5)

Or

Explain how a nerve impulse gets transmitted across a chemical synapse.

Q. 28. List any four differences between non-cyclic and cyclic photophosphory lation. Do they both occur simultaneously in the chloroplast? Give reason. (5)

Or

Explain the involvement of two cell types in the C plants in avoiding the occurrence of photorespiration.

Biology 2006 Question Papers Class XII
Delhi		Outside Delhi		Compartment Delhi		Compartment Outside Delhi
	Set I		Set I		Set I		Set I
	Set II		Set II		Set II		Set II
	Set III		Set III		Set III