CBSE Guess > Papers > Question Papers > Class XII > 2005 > Biology > Delhi Set-III

BIOLOGY 2005 (Set III—Delhi)

Except for the following questions all the remaining questions have been a, in Set I & Set II.

SECTION - A

Q. 1. What is Chemotaxis? 1

Q. 2. Mention two characteristics of a species that make it susceptible to extinction. 1
Q. 4. Name the respective secretions of Goblet cells and Parietal cells in human stomach. 1

Q. 5. What happens in lymphoid organs with respect to immunity? 1
SECTION - B

Q. 11. How does an isograft differ from an allograft? What does the success of allograft depend on? 2

Q. 14. What are the chemical changes in a pyruvic acid molecule, before it enters mitochondria? 2

SECTION - C

Q. 16. Name the category of bones forming the rib cage. How are these articulated to each other to form the cage? 3

Q. 18. Why is glomerular filtrate hypertonic and hypotonic in descending and ascending limb of loop of Henle respectively? What is the effect of ADH on collecting tubules? 3
SECTION - D

Q. 26. What is the basis of classifying cancer? Name and explain the different categories of cancer. Mention any two approaches for cancer treatment. 5
Or
What is embryo culture? What is the objective of this culture? Describe the three applications of this technique.

Q. 28. What is photophosphorylation? Explain the two ways of this mechanism
occurring in chloroplasts. 5
Or
Describe the process of progressive reduction of one molecule of nitrogen during nitrogen fixation in leguminous plants.

Biology 2005 Question Papers Class XII
Delhi		Outside Delhi		Compartment
	Set I		Set I		Set I
	Set II		Set II		Set II
	Set III		Set III		Set III

CBSE 2005 Question Papers Class XII
	English		Sociology
	Functional English		Psychology
	Mathematics		Philosopy
	Physics		Computer Science
	Chemistry		Entrepreneurship
	Biology		Informatics Practices
	Geography		Multimedia & Web Technology
	Economics		Biotechnology
	Business Studies		Physical Education
	Accountancy		Fine Arts
	Political Science		History
	Agriculture